System.Math.Log(double, double)

Here are the examples of the csharp api System.Math.Log(double, double) taken from open source projects. By voting up you can indicate which examples are most useful and appropriate.

643 Examples 7

19 View Source File : Mathf.cs
License : MIT License
Project Creator : AnotherEnd15

public static float Log(float f, float p)
        {
            return (float) Math.Log((double) f, (double) p);
        }

19 View Source File : ExtensibleArrayHeader.cs
License : GNU Lesser General Public License v3.0
Project Creator : Apollo3zehn

private void Initialize()
        {
            // H5EA.hdr.c (H5EA__hdr_init)

            /* Compute general information */
            this.SecondaryBlockCount = 1UL +
                this.ExtensibleArrayMaximumNumberOfElementsBits -
                (uint)Math.Log(DataBlockMininumElementsCount, 2);

            this.DataBlockPageElementsCount = 1UL << this.DataBlockPageMaximumNumberOfElementsBits;
            this.ArrayOffsetsSize = (byte)((this.ExtensibleArrayMaximumNumberOfElementsBits + 7) / 8);

            /* Allocate information for each super block */
            this.SecondaryBlockInfos = new ExtensibleArraySecondaryBlockInformation[this.SecondaryBlockCount];

            /* Compute information about each super block */
            var elementStartIndex = 0UL;
            var dataBlockStartIndex = 0UL;

            for (ulong i = 0; i < this.SecondaryBlockCount; i++)
            {
                this.SecondaryBlockInfos[i].DataBlockCount = (ulong)(1 << ((int)i / 2));
                this.SecondaryBlockInfos[i].ElementsCount = (ulong)(1 << (((int)i + 1) / 2)) * this.DataBlockMininumElementsCount;
                this.SecondaryBlockInfos[i].ElementStartIndex = elementStartIndex;
                this.SecondaryBlockInfos[i].DataBlockStartIndex = dataBlockStartIndex;

                /* Advance starting indices for next super block */
                elementStartIndex += this.SecondaryBlockInfos[i].DataBlockCount * this.SecondaryBlockInfos[i].ElementsCount;
                dataBlockStartIndex += this.SecondaryBlockInfos[i].DataBlockCount;
            }
        }

19 View Source File : HyperbolicCoordinatesPostProcessorSystem.cs
License : MIT License
Project Creator : allenwp

public static void PostProcess(List<Sample3D[]> samples3D, PostProcessor3D postProcessor)
        {
            HyperbolicCoordinatesPostProcessor hyperbolicPP = postProcessor as HyperbolicCoordinatesPostProcessor;

            var origin = hyperbolicPP.Origin.Position;
            var zScale = hyperbolicPP.ZScale;

            var rangeParreplacedioner = Parreplacedioner.Create(samples3D);
            Parallel.ForEach(rangeParreplacedioner, samples3DArray =>
            {
                for (int i = 0; i < samples3DArray.Length; i++)
                {
                    var newPosition = samples3DArray[i].Position - origin;
                    newPosition.Z *= zScale;

                    // https://stackoverflow.com/questions/23744120/conversion-from-rectangular-to-hyperbolic-coordinates-not-reversible
                    newPosition = new Vector3(newPosition.X, (float)Math.Sqrt(newPosition.Z * newPosition.Y), (float)Math.Log(newPosition.Y / newPosition.Z));

                    newPosition += origin;
                    samples3DArray[i].Position = newPosition;
                }
            });
        }

19 View Source File : HistogramBinSizeCalculator.cs
License : MIT License
Project Creator : AndreyAkinshin

public static double CalcSturges(int n, double min, double max)
        {
            return (max - min) / (Math.Ceiling(Math.Log(n, 2)) + 1);
        }

19 View Source File : ExponentialDistribution.cs
License : MIT License
Project Creator : AndreyAkinshin

public double Quantile(Probability p) => - Log(1 - p) / Rate;

19 View Source File : FileAttachmentControlViewModel.cs
License : GNU General Public License v3.0
Project Creator : alexdillon

private static string BytesToString(long byteCount)
        {
            string[] suf = { "B", "KB", "MB", "GB", "TB", "PB", "EB" }; // Longs run out around EB
            if (byteCount == 0)
            {
                return "0" + suf[0];
            }

            long bytes = Math.Abs(byteCount);
            int place = Convert.ToInt32(Math.Floor(Math.Log(bytes, 1024)));
            double num = Math.Round(bytes / Math.Pow(1024, place), 1);
            return (Math.Sign(byteCount) * num).ToString() + " " + suf[place];
        }

19 View Source File : FractalHeapHeader.cs
License : GNU Lesser General Public License v3.0
Project Creator : Apollo3zehn

private (FractalHeapIndirectBlock IndirectBlock, ulong entry) Locate(ulong offset)
        {
            var (row, column) = this.Lookup(offset);

            this.Reader.Seek((long)this.RootBlockAddress, SeekOrigin.Begin);
            var indirectBlock = new FractalHeapIndirectBlock(this, this.Reader, _superblock, this.RootIndirectBlockRowsCount);

            uint entry;

            while (row >= this.MaxDirectRows)
            {
                /* Compute # of rows in child indirect block */
                var nrows = (uint)Math.Log(this.RowBlockSizes[row], 2) - this.FirstRowBits + 1;

                if (nrows >= indirectBlock.RowCount)
                    throw new Exception("Child fractal heap block must be smaller than its parent.");

                /* Compute indirect block's entry */
                entry = row * this.TableWidth + column;

                /* Locate child indirect block */
                var indirectBlockEntry = indirectBlock.Entries[entry];
 
                /* Use new indirect block */
                this.Reader.Seek((long)indirectBlockEntry.Address, SeekOrigin.Begin);
                indirectBlock = new FractalHeapIndirectBlock(this, this.Reader, _superblock, nrows);

                /* Look up row & column in new indirect block for object */
                (row, column) = this.Lookup(offset - indirectBlock.BlockOffset);

                if (row >= indirectBlock.RowCount)
                    throw new Exception("Child fractal heap block must be smaller than its parent.");
            }

            entry = row * this.TableWidth + column;

            return (indirectBlock, entry);
        }

19 View Source File : DynamicHierarchy.cs
License : The Unlicense
Project Creator : aeroson

protected override void UpdateMulreplacedhreaded()
        {
            lock (Locker)
            {
                Overlaps.Clear();
                if (root != null)
                {
                    //To mulreplacedhread the tree traversals, we have to do a little single threaded work.
                    //Dive down into the tree far enough that there are enough nodes to split amongst all the threads in the thread manager.
                    //The depth to which we dive is offset by some precomputed values (when available) or a guess based on whether or not the 
                    //thread count is a power of 2.  Thread counts which are a power of 2 match well to the binary tree, while other thread counts
                    //require going deeper for better distributions.
                    int offset = ParallelLooper.ThreadCount <= threadSplitOffsets.Length
                                     ? threadSplitOffsets[ParallelLooper.ThreadCount - 1]
                                     : (ParallelLooper.ThreadCount & (ParallelLooper.ThreadCount - 1)) == 0 ? 0 : 2;
                    int splitDepth = offset + (int)Math.Ceiling(Math.Log(ParallelLooper.ThreadCount, 2));
#if PROFILE
                    startRefit = Stopwatch.GetTimestamp();
#endif
                    MulreplacedhreadedRefitPhase(splitDepth);
#if PROFILE
                    endRefit = Stopwatch.GetTimestamp();
#endif
                    MulreplacedhreadedOverlapPhase(splitDepth);
#if PROFILE
                    endOverlap = Stopwatch.GetTimestamp();
#endif
                }
            }

        }

19 View Source File : Ln.cs
License : Apache License 2.0
Project Creator : Appdynamics

public override CompileResult Execute(IEnumerable<FunctionArgument> arguments, ParsingContext context)
    {
        ValidateArguments(arguments, 1);
        var arg = ArgToDecimal(arguments, 0);
        return CreateResult(System.Math.Log(arg, System.Math.E), DataType.Decimal);
    }

19 View Source File : DiscordUser.cs
License : MIT License
Project Creator : Aiko-IT-Systems

public string GetAvatarUrl(ImageFormat fmt, ushort size = 1024)
        {
            if (fmt == ImageFormat.Unknown)
                throw new ArgumentException("You must specify valid image format.", nameof(fmt));

            if (size < 16 || size > 2048)
                throw new ArgumentOutOfRangeException(nameof(size));

            var log = Math.Log(size, 2);
            if (log < 4 || log > 11 || log % 1 != 0)
                throw new ArgumentOutOfRangeException(nameof(size));

            var sfmt = "";
            sfmt = fmt switch
            {
                ImageFormat.Gif => "gif",
                ImageFormat.Jpeg => "jpg",
                ImageFormat.Png => "png",
                ImageFormat.WebP => "webp",
                ImageFormat.Auto => !string.IsNullOrWhiteSpace(this.AvatarHash) ? (this.AvatarHash.StartsWith("a_") ? "gif" : "png") : "png",
                _ => throw new ArgumentOutOfRangeException(nameof(fmt)),
            };

19 View Source File : BinomialDistribution.cs
License : MIT License
Project Creator : AndreyAkinshin

public double Pmf(int k)
        {
            if (k < 0 || k > N)
                return 0;

            return Math.Exp(
                BinomialCoefficientHelper.GetLogBinomialCoefficient(N, k) +
                k * Math.Log(P) +
                (N - k) * Math.Log(1 - P)
            );
        }

19 View Source File : GumbelDistribution.cs
License : MIT License
Project Creator : AndreyAkinshin

public double Quantile(Probability p)
        {
            return p.Value switch
            {
                0 => double.NegativeInfinity,
                1 => double.PositiveInfinity,
                _ => M - S * Log(-Log(p))
            };

19 View Source File : UnitsCalculator.cs
License : MIT License
Project Creator : alaabenfatma

public static string SizeCalc(long byteCount)
        {
            string[] suf = {"B", "KB", "MB", "GB", "TB", "PB", "EB"};
            if (byteCount == 0)
                return "0" + suf[0];
            var bytes = Math.Abs(byteCount);
            var place = Convert.ToInt32(Math.Floor(Math.Log(bytes, 1024)));
            var num = Math.Round(bytes / Math.Pow(1024, place), 1);
            return Math.Sign(byteCount) * num + suf[place];
        }

19 View Source File : AxisLabels.cs
License : MIT License
Project Creator : AngeloCresta

internal void FillLabels(bool removeFirstRow)
        {
#if SUBAXES
			// Process all sub-axis
			foreach(SubAxis subAxis in ((Axis)this).SubAxes)
			{
				subAxis.FillLabels(true);
			}
#endif // SUBAXES

            // Labels are disabled for this axis
			if( !this.LabelStyle.Enabled || !this.enabled )
			{
				return;
			}

			// For circular chart area fill only Y axis labels
			if(this.ChartArea != null && this.ChartArea.chartAreaIsCurcular)
			{
				if(this.axisType != AxisName.Y)
				{
					ICircularChartType type = this.ChartArea.GetCircularChartType();
					if(type == null || !type.XAxisLabelsSupported())
					{
						return;
					}
				}
			}

			// Check if the custom labels exist
			bool customLabelsFlag = false;
			foreach( CustomLabel lab in CustomLabels )
			{
				if( lab.customLabel )
				{
					if( lab.RowIndex == 0 ||
						this.ChartArea.chartAreaIsCurcular)
					{
						customLabelsFlag = true;
					}
				}
			}


			// Remove the first row of labels if custom labels not exist
			if(removeFirstRow)
			{
				if( customLabelsFlag == false )
				{
					for( int index = 0; index < CustomLabels.Count; index++ )
					{
						if( CustomLabels[index].RowIndex == 0 )
						{
							CustomLabels.RemoveAt( index );
							index = -1;
						}
					}
				}
				else
				{
					return;
				}
			}

			// Get data series for this axis.
			List<string> dataSeries = null;
			switch( axisType )
			{
				case AxisName.X:
					dataSeries = ChartArea.GetXAxesSeries( AxisType.Primary, ((Axis)this).SubAxisName );
					break;
				case AxisName.Y:
					dataSeries = ChartArea.GetYAxesSeries( AxisType.Primary, ((Axis)this).SubAxisName );
					break;
				case AxisName.X2:
					dataSeries = ChartArea.GetXAxesSeries( AxisType.Secondary, ((Axis)this).SubAxisName );
					break;
				case AxisName.Y2:
					dataSeries = ChartArea.GetYAxesSeries( AxisType.Secondary, ((Axis)this).SubAxisName );
					break;
			}

			// There aren't data series connected with this axis.
			if( dataSeries.Count == 0 )
			{
				return;
			}

            //Let's convert the ArrayList of the series names into to string[]
            string[] dataSeriesNames = new string[dataSeries.Count];
            for (int i = 0; i < dataSeries.Count; i++)
                dataSeriesNames[i] = (string)dataSeries[i];

			// Check if series X values all set to zeros
            bool seriesXValuesZeros = ChartHelper.SeriesXValuesZeros(this.Common, dataSeriesNames);

            // Check if series is indexed (All X values zeros or IsXValueIndexed flag set)
            bool indexedSeries = true;
            if (!seriesXValuesZeros)
            {
                indexedSeries = ChartHelper.IndexedSeries(this.Common, dataSeriesNames);
            }

			// Show End Labels
			int endLabels = 0;
			if( labelStyle.IsEndLabelVisible )
			{
				endLabels = 1;
			}

			// Get chart type of the first series
			IChartType	chartType = Common.ChartTypeRegistry.GetChartType( ChartArea.GetFirstSeries().ChartTypeName );
			bool		fromSeries = false;
			if( !chartType.RequireAxes )
			{
				return;
			}
			else if( axisType == AxisName.Y || axisType == AxisName.Y2 )
			{
				fromSeries = false;
			}
			else
			{
				fromSeries = true;
			}

			// X values from data points are not 0.
            if (fromSeries && !ChartHelper.SeriesXValuesZeros(this.Common, dataSeries.ToArray()))
			{
				fromSeries = false;
			}

			// X values from data points are not 0.
			if( fromSeries && ( labelStyle.GetIntervalOffset() != 0 || labelStyle.GetInterval() != 0 ) )
			{
				fromSeries = false;
			}

			// Get value type
			ChartValueType valueType;
			if( axisType == AxisName.X || axisType == AxisName.X2 )
			{
				// If X value is indexed the type is always String. So we use indexed type instead
				valueType = Common.DataManager.Series[dataSeries[0]].indexedXValueType;
			}
			else
			{
				valueType = Common.DataManager.Series[dataSeries[0]].YValueType;
			}

			if( labelStyle.GetIntervalType() != DateTimeIntervalType.Auto && 
                labelStyle.GetIntervalType() != DateTimeIntervalType.Number )
			{
                if (valueType != ChartValueType.Time && 
                    valueType != ChartValueType.Date && 
                    valueType != ChartValueType.DateTimeOffset)
				{
					valueType = ChartValueType.DateTime;
				}
			}

			// ***********************************
			// Pre calculate some values
			// ***********************************
			double viewMaximum = this.ViewMaximum;
			double viewMinimum = this.ViewMinimum;

			// ***********************************
			// Labels are filled from data series.
			// ***********************************
			if( fromSeries )
			{
				int numOfPoints;
				numOfPoints = Common.DataManager.GetNumberOfPoints( dataSeries.ToArray() );

				// Show end labels
				if( endLabels == 1 )
				{
					// min position
					CustomLabels.Add( - 0.5, 0.5, ValueConverter.FormatValue(
						this.Common.Chart,
						this,
                        null,
						0.0, 
						this.LabelStyle.Format, 
						valueType,
						ChartElementType.AxisLabels), 
						false);
				}

				// Labels from point position
				for( int point = 0; point < numOfPoints; point++ )
				{
					CustomLabels.Add( ((double)point)+ 0.5, ((double)point)+ 1.5, 
						ValueConverter.FormatValue(
							this.Common.Chart,
							this,
                            null,
							point + 1, 
							this.LabelStyle.Format, 
							valueType,
							ChartElementType.AxisLabels), 
							false);
				}

				// Show end labels
				if( endLabels == 1 )
				{
					// max position
					CustomLabels.Add( ((double)numOfPoints)+ 0.5, ((double)numOfPoints)+ 1.5, 
						ValueConverter.FormatValue(
							this.Common.Chart,
							this,
                            null,
                            numOfPoints + 1, 
							this.LabelStyle.Format, 
							valueType,
							ChartElementType.AxisLabels), 
							false);
				}

				int pointIndx;
				foreach( string seriesIndx in dataSeries )
				{
					// End labels enabled
					if( endLabels == 1 )
						pointIndx = 1;
					else
						pointIndx = 0;

					// Set labels from data points labels
					foreach( DataPoint dataPoint in Common.DataManager.Series[ seriesIndx ].Points )
					{
						// Find first row of labels
						while( CustomLabels[pointIndx].RowIndex > 0 )
						{
							pointIndx++;
						}

						// Add X labels
						if( axisType == AxisName.X || axisType == AxisName.X2 )
						{
							if( dataPoint.AxisLabel.Length > 0 )
							{
								CustomLabels[pointIndx].Text = dataPoint.AxisLabel;
							}
						}
	
						pointIndx++;
					}
				}
			}
			// ***********************************
			// Labels are filled from axis scale.
			// ***********************************
			else
			{
				if( viewMinimum == viewMaximum )
					return;

				double labValue; // Value, which will be converted to text and used for, labels.
				double beginPosition; // Begin position for a label
				double endPosition; // End position for a label
				double start; // Start position for all labels

				// Get first series attached to this axis
				Series	axisSeries = null;
				if(axisType == AxisName.X || axisType == AxisName.X2)
				{
					List<string> seriesArray = ChartArea.GetXAxesSeries((axisType == AxisName.X) ? AxisType.Primary : AxisType.Secondary, ((Axis)this).SubAxisName);
					if(seriesArray.Count > 0)
					{
						axisSeries = Common.DataManager.Series[seriesArray[0]];
						if(axisSeries != null && !axisSeries.IsXValueIndexed)
						{
							axisSeries = null;
						}
					}
				}

                // ***********************************
                // Check if the AJAX zooming and scrolling mode is enabled.
                // Labels are filled slightly different in this case.
                // ***********************************
                DateTimeIntervalType offsetType = (labelStyle.GetIntervalOffsetType() == DateTimeIntervalType.Auto) ? labelStyle.GetIntervalType() : labelStyle.GetIntervalOffsetType();

				// By default start is equal to minimum
				start = viewMinimum; 

				// Adjust start position depending on the interval type
				if(!this.ChartArea.chartAreaIsCurcular ||
					this.axisType == AxisName.Y || 
					this.axisType == AxisName.Y2 )
				{
                    start = ChartHelper.AlignIntervalStart(start, labelStyle.GetInterval(), labelStyle.GetIntervalType(), axisSeries);
				}
				
				// Move start if there is start position
				if( labelStyle.GetIntervalOffset() != 0 && axisSeries == null)
				{
                    start += ChartHelper.GetIntervalSize(start, labelStyle.GetIntervalOffset(), 
						offsetType, axisSeries, 0, DateTimeIntervalType.Number, true, false);
				}

				// ***************************************
				// Date type
				// ***************************************
				if( valueType == ChartValueType.DateTime || 
					valueType == ChartValueType.Date ||
					valueType == ChartValueType.Time ||
                    valueType == ChartValueType.DateTimeOffset ||
					axisSeries != null)
				{
					double position = start;
					double dateInterval;

					// Too many labels
                    if ((viewMaximum - start) / ChartHelper.GetIntervalSize(start, labelStyle.GetInterval(), labelStyle.GetIntervalType(), axisSeries, 0, DateTimeIntervalType.Number, true) > ChartHelper.MaxNumOfGridlines)
						return;

					int	counter = 0;
                    double endLabelMaxPosition = viewMaximum - ChartHelper.GetIntervalSize(viewMaximum, labelStyle.GetInterval(), labelStyle.GetIntervalType(), axisSeries, labelStyle.GetIntervalOffset(), offsetType, true) / 2f;
                    double endLabelMinPosition = viewMinimum + ChartHelper.GetIntervalSize(viewMinimum, labelStyle.GetInterval(), labelStyle.GetIntervalType(), axisSeries, labelStyle.GetIntervalOffset(), offsetType, true) / 2f;
					while( (decimal)position <= (decimal)viewMaximum )
					{
                        dateInterval = ChartHelper.GetIntervalSize(position, labelStyle.GetInterval(), labelStyle.GetIntervalType(), axisSeries, labelStyle.GetIntervalOffset(), offsetType, true);
						labValue = position;

						// For IsLogarithmic axes
						if( this.IsLogarithmic )
						{
							labValue = Math.Pow( this.logarithmBase, labValue );
						}

                        // Check if we do not exceed max number of elements
                        if (counter++ > ChartHelper.MaxNumOfGridlines)
                        {
                            break;
                        }

                        if (endLabels == 0 && position >= endLabelMaxPosition)
                        {
                            break;
                        }

						beginPosition = position - dateInterval * 0.5;
						endPosition = position + dateInterval * 0.5;

						if(endLabels == 0 && position <=  endLabelMinPosition)
						{
							position += dateInterval;
							continue;
						}
						
						if( (decimal)beginPosition > (decimal)viewMaximum )
						{
							position += dateInterval;
							continue;
						}

                        // NOTE: Fixes issue #6466
                        // Following code is removed due to the issues caused by the rounding error

                        //if( (((decimal)beginPosition + (decimal)endPosition) / 2.0m) < (decimal)viewMinimum )
                        //{
                        //    position += dateInterval;
                        //    continue;
                        //}
                        //if ((decimal)viewMaximum < (((decimal)beginPosition + (decimal)endPosition) / 2m))
                        //{
                        //    position += dateInterval;
                        //    continue;
                        //}

						string pointLabel = GetPointLabel( dataSeries, labValue, !seriesXValuesZeros, indexedSeries );
						if( pointLabel.Length == 0 )
						{
							// Do not draw last label for indexed series
							if( position <= this.maximum )
							{
								// Add a label to the collection
								if( position != this.maximum || !Common.DataManager.Series[ dataSeries[0] ].IsXValueIndexed )
								{
									CustomLabels.Add( beginPosition, 
										endPosition, 
										ValueConverter.FormatValue(
											this.Common.Chart,
											this,
                                            null,
											labValue, 
											this.LabelStyle.Format, 
											valueType,
											ChartElementType.AxisLabels),
										false);
								}
							}
						}
						else
						{
							// Add a label to the collection
							CustomLabels.Add( beginPosition, 
								endPosition, 
								pointLabel,
								false);
						}
						position += dateInterval;
					}
				}
				else
				{
					// ***************************************
					// Scale value type
					// ***************************************

					// Show First label if Start Label position is used
					if( start != viewMinimum )
						endLabels = 1;

					// Set labels
					int labelCounter = 0;
                    for (double position = start - endLabels * labelStyle.GetInterval(); position < viewMaximum - 1.5 * labelStyle.GetInterval() * (1 - endLabels); position = (double)((decimal)position + (decimal)labelStyle.GetInterval()))
					{
						// Prevent endless loop that may be caused by very small interval
						// and double/decimal rounding errors
						++labelCounter;
						if(labelCounter > ChartHelper.MaxNumOfGridlines)
						{
							break;
						}

						labValue = (double)((decimal)position + (decimal)labelStyle.GetInterval());

						// This line is introduce because sometimes 0 value will appear as 
						// very small value close to zero.
						double inter = Math.Log(labelStyle.GetInterval());
						double valu = Math.Log(Math.Abs(labValue));
						int digits = (int)Math.Abs(inter)+5;

						if( digits > 15 )
						{
							digits = 15;
						}

						if( Math.Abs(inter) < Math.Abs(valu)-5 )
						{
							labValue = Math.Round(labValue,digits);
						}

						// Too many labels
						if( ( viewMaximum - start ) / labelStyle.GetInterval() > ChartHelper.MaxNumOfGridlines )
						{
							return;
						}

						// For IsLogarithmic axes
						if( this.IsLogarithmic )
							labValue = Math.Pow( this.logarithmBase, labValue );

						beginPosition = (double)((decimal)position + (decimal)labelStyle.GetInterval() * 0.5m);
						endPosition = (double)((decimal)position + (decimal)labelStyle.GetInterval() * 1.5m);
						
						if( (decimal)beginPosition > (decimal)viewMaximum )
						{
							continue;
						}

						// Show End label if Start Label position is used
						// Use decimal type to solve rounding issues
						if( (decimal)(( beginPosition + endPosition )/2.0) > (decimal)viewMaximum )
						{
							continue;
						}

						string pointLabel = GetPointLabel( dataSeries, labValue, !seriesXValuesZeros, indexedSeries  );
						if( pointLabel.Length > 15 && labValue < 0.000001)
						{
							labValue = 0.0;
						}

						if( pointLabel.Length == 0 )
						{
							// Do not draw last label for indexed series
							if( !(Common.DataManager.Series[ dataSeries[0] ].IsXValueIndexed && position > this.maximum) )
							{
								// Add a label to the collection
								CustomLabels.Add( beginPosition, 
									endPosition, 
									ValueConverter.FormatValue(
										this.Common.Chart,
										this,
                                        null,
										labValue, 
										this.LabelStyle.Format, 
										valueType,
										ChartElementType.AxisLabels),
									false);
							}
						}
						else
						{
							// Add a label to the collection
							CustomLabels.Add( beginPosition, 
								endPosition, 
								pointLabel,
								false);
						}
					}
				}
			}
		}

19 View Source File : SoftPlusKernel.cs
License : MIT License
Project Creator : adamtiger

public static void SoftPlusLambda(IData data)
        {
            data.ApplyToAll(p =>
            {
                return Math.Log(1 + Math.Exp(p));
            });
        }

19 View Source File : AttributesMaster.cs
License : GNU Lesser General Public License v3.0
Project Creator : ApexGameTools

public static void Refresh()
        {
            var markerAttribute = typeof(EnreplacedyAttributesEnumAttribute);

#if NETFX_CORE
            var markerAttributeInf = markerAttribute.GetTypeInfo();
            var defaultAttributeInf = typeof(DefaultEnreplacedyAttributesEnum).GetTypeInfo();
            var asm = markerAttributeInf.replacedembly;

            attributesEnumType = asm.DefinedTypes.Where(t => t.IsEnum && t.CustomAttributes.Any(a => a.AttributeType == markerAttribute) && t != defaultAttributeInf).FirstOrDefault().AsType();
#else
            var asm = markerAttribute.replacedembly;
            attributesEnumType = asm.GetTypes().Where(t => t.IsEnum && Attribute.IsDefined(t, markerAttribute) && t != typeof(DefaultEnreplacedyAttributesEnum)).FirstOrDefault();
#endif
            if (attributesEnumType == null)
            {
                attributesEnabled = false;
                highestOrderBit = 0;
                attributesEnumType = typeof(DefaultEnreplacedyAttributesEnum);
            }
            else
            {
                var vals = Enum.GetValues(attributesEnumType);
                highestOrderBit = (int)Math.Log((int)vals.GetValue(vals.Length - 1), 2);
                attributesEnabled = true;
            }
        }

19 View Source File : DoubleExtensions.cs
License : MIT License
Project Creator : AlexGyver

public static double GetExponent(this double x)
        {
            return Math.Round(Math.Log(Math.Abs(x), 10));
        }

19 View Source File : FractalHeapHeader.cs
License : GNU Lesser General Public License v3.0
Project Creator : Apollo3zehn

private void CalculateBlockSizeTables()
        {
            // from H5HFdtable.c
            this.StartingBits = (uint)Math.Log(this.StartingBlockSize, 2);
            this.FirstRowBits = (uint)(this.StartingBits + Math.Log(this.TableWidth, 2));

            var maxDirectBits = (uint)Math.Log(this.MaximumDirectBlockSize, 2);
            this.MaxDirectRows = maxDirectBits - this.StartingBits + 2;

            var maxRootRows = this.MaximumHeapSize - this.FirstRowBits;

            this.RowBlockSizes = new ulong[maxRootRows];
            this.RowBlockOffsets = new ulong[maxRootRows];

            var tmpBlockSize = this.StartingBlockSize;
            var acreplacedulatedBlockOffset = this.StartingBlockSize * this.TableWidth;

            this.RowBlockSizes[0] = tmpBlockSize;
            this.RowBlockOffsets[0] = 0;

            for (ulong i = 1; i < maxRootRows; i++)
            {
                this.RowBlockSizes[i] = tmpBlockSize;
                this.RowBlockOffsets[i] = acreplacedulatedBlockOffset;
                tmpBlockSize *= 2;
                acreplacedulatedBlockOffset *= 2;
            }
        }

19 View Source File : LinearToLogarithmicValueConverter.cs
License : MIT License
Project Creator : ABTSoftware

public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value is IConvertible convertible)
            {
                return Math.Log(convertible.ToDouble(CultureInfo.InvariantCulture), LogarithmicBase);
            }

            return value;
        }

19 View Source File : Log.cs
License : Apache License 2.0
Project Creator : Appdynamics

public override CompileResult Execute(IEnumerable<FunctionArgument> arguments, ParsingContext context)
        {
            ValidateArguments(arguments, 1);
            var number = ArgToDecimal(arguments, 0);
            if (arguments.Count() == 1)
            {
                return CreateResult(System.Math.Log(number, 10d), DataType.Decimal);
            }
            var newBase = ArgToDecimal(arguments, 1);
            return CreateResult(System.Math.Log(number, newBase), DataType.Decimal);
        }

19 View Source File : DoubleExtension.cs
License : MIT License
Project Creator : AlphaYu

public static double Log(this double d, double newBase)
        {
            return Math.Log(d, newBase);
        }

19 View Source File : DownloadUpdateDialog.cs
License : MIT License
Project Creator : Analogy-LogViewer

private static string BytesToString(long byteCount)
        {
            string[] suf = { "B", "KB", "MB", "GB", "TB", "PB", "EB" };
            if (byteCount == 0)
            {
                return "0" + suf[0];
            }

            long bytes = Math.Abs(byteCount);
            int place = Convert.ToInt32(Math.Floor(Math.Log(bytes, 1024)));
            double num = Math.Round(bytes / Math.Pow(1024, place), 1);
            return $"{(Math.Sign(byteCount) * num).ToString(CultureInfo.InvariantCulture)} {suf[place]}";
        }

19 View Source File : CreateInvertedIndex.cs
License : MIT License
Project Creator : ABTSoftware

public static void CreateIndex(IEnumerable<KeyValuePair<Guid, Example>> examples)
        {
            var ex = examples.ToList();
            foreach (var example in ex)
            {
                string lines = GetTextFromExample(example.Value);
                var terms = GetTerms(lines);

                // Memory optimisation. Store term indices as ushort (16bit)
                if (terms.Count > ushort.MaxValue)
                    throw new InvalidOperationException("Too many terms in this example: " + example.Value.replacedle);

                var termDictExample = new Dictionary<string, List<ushort>>();
                for (ushort i = 0; i < terms.Count; i++)
                {
                    var term = terms[i];
                    if (termDictExample.ContainsKey(term))
                    {
                        termDictExample[term].Add(i);
                    }
                    else
                    {
                        termDictExample[term] = new List<ushort> { i };
                    }
                }

                var norm = Math.Sqrt(termDictExample.Sum(termDict => Sqr(termDict.Value.Count)));

                foreach (var termDict in termDictExample)
                {
                    var term = termDict.Key;
                    termDict.Value.TrimExcess();

                    if (_invertedIndex.ContainsKey(term))
                    {
                        var ti = new TermInfo(example.Key, termDict.Value.ToArray(), (float) (termDict.Value.Count / norm));
                        _invertedIndex[term].TermInfos.Add(ti);
                    }
                    else
                    {
                        _invertedIndex[term] = new Posting(new List<TermInfo>
                        {
                            new TermInfo(example.Key, termDict.Value.ToArray(), (float) (termDict.Value.Count/norm))
                        });
                    }
                    _invertedIndex[term].InvertedDoreplacedentFrequency += 1;
                }
            }

            _invertedIndex.ForEachDo(
                x => x.Value.InvertedDoreplacedentFrequency = Math.Log(ex.Count/x.Value.InvertedDoreplacedentFrequency));
        }

19 View Source File : FrechetDistribution.cs
License : MIT License
Project Creator : AndreyAkinshin

public double Quantile(Probability p)
        {
            return p.Value switch
            {
                0 => double.Epsilon,
                1 => double.PositiveInfinity,
                _ => M + S * Pow(-Log(p), -1 / A)
            };

19 View Source File : Era.cs
License : Apache License 2.0
Project Creator : ajuna-network

public static Era Create(uint lifeTime, ulong finalizedHeaderBlockNumber)
        {
            if (lifeTime == 0)
            {
                return new Era(0, 0, true);
            }

            // NODE: { "IsImmortal":false,"Period":64,"Phase":49}
            // API: { "IsImmortal":false,"Period":64,"Phase":61}

            // RUST Implementation
            //let period = period.checked_next_power_of_two()
            //    .unwrap_or(1 << 16)
            //    .max(4)
            //    .min(1 << 16);
            //let phase = current % period;
            //let quantize_factor = (period >> 12).max(1);
            //let quantized_phase = phase / quantize_factor * quantize_factor;
            //Era::Mortal(period, quantized_phase)

            ulong period = (ulong)Math.Pow(2, Math.Round(Math.Log(lifeTime, 2)));
            period = Math.Max(period, 4);
            period = Math.Min(period, 65536);
            ulong phase = finalizedHeaderBlockNumber % period;
            var quantize_factor = Math.Max(period >> 12, 1);
            var quantized_phase = phase / quantize_factor * quantize_factor;

            return new Era(period, quantized_phase, false);
        }

19 View Source File : WeibullDistribution.cs
License : MIT License
Project Creator : AndreyAkinshin

public double Quantile(Probability p)
        {
            return p.Value switch
            {
                0 => 0,
                1 => double.PositiveInfinity,
                _ => Lambda * Pow(-Log(1 - p), 1 / K)
            };

19 View Source File : LaplaceDistribution.cs
License : MIT License
Project Creator : AndreyAkinshin

public double Quantile(Probability p) => p < Probability.Half
            ? Mu + Sigma * Log(2 * p)
            : Mu - Sigma * Log(2 - 2 * p);

19 View Source File : Era.cs
License : Apache License 2.0
Project Creator : ajuna-network

public byte[] Encode()
        {
            if (IsImmortal)
            {
                return new byte[] { 0x00 };
            }
            var quantizeFactor = Math.Max(1, Period / 4096);
            var lastBit = Period & (ulong)-(long)Period;
            //var rest = _period;
            //var lastBit = 1;
            //while (rest % 2 == 0 && rest != 0)
            //{
            //    rest /= 2;
            //    lastBit *= 2;
            //}
            var logOf2 = lastBit != 0 ? Math.Log(lastBit, 2) : 64;
            var low = (ushort)Math.Min(15, Math.Max(1, logOf2 - 1));
            var high = (ushort)(Phase / quantizeFactor << 4);
            var encoded = (ushort)(low | high);

            return BitConverter.GetBytes(encoded);
        }

19 View Source File : BetaFunction.cs
License : MIT License
Project Creator : AndreyAkinshin

public static double IncompleteLogValue(double a, double b, double x)
        {
            return a * Log(x) - Log(a) + Log(HypergeometricFunction.Value(a, 1 - b, a + 1, x, (int) Round(b)));
        }

19 View Source File : PHashTable.cs
License : GNU Affero General Public License v3.0
Project Creator : ACEmulator

private static uint GetNumBits(uint num)
        {
            return (uint)Math.Log(num, 2) + 1;
        }

19 View Source File : IdGen.Static.cs
License : MIT License
Project Creator : anet-team

private static int GetBitsLength(long number)
        {
            return (int)Math.Log(number, 2) + 1;
        }

19 View Source File : TileCover.cs
License : MIT License
Project Creator : alen-smajic

public static UnwrappedTileId CoordinateToTileId(Vector2d coord, int zoom)
		{
			var lat = coord.x;
			var lng = coord.y;

			// See: http://wiki.openstreetmap.org/wiki/Slippy_map_tilenames
			var x = (int)Math.Floor((lng + 180.0) / 360.0 * Math.Pow(2.0, zoom));
			var y = (int)Math.Floor((1.0 - Math.Log(Math.Tan(lat * Math.PI / 180.0)
					+ 1.0 / Math.Cos(lat * Math.PI / 180.0)) / Math.PI) / 2.0 * Math.Pow(2.0, zoom));

			return new UnwrappedTileId(zoom, x, y);
		}

19 View Source File : FileSizeFormatConverter.cs
License : MIT License
Project Creator : AngryCarrot789

static string SizeSuffix(long value, int decimalPlaces = 3)
        {
            if (decimalPlaces < 0) return "No decimals";
            if (value == 0) { return string.Format("{0:n" + decimalPlaces + "} bytes", 0); }

            // mag is 0 for bytes, 1 for KB, 2, for MB, etc.
            int mag = (int)Math.Log(value, 1024);
            decimal adjustedSize = (decimal)value / (1L << (mag * 10));

            if (Math.Round(adjustedSize, decimalPlaces) >= 1000)
            {
                mag += 1;
                adjustedSize /= 1024;
            }

            return string.Format("{0:n" + decimalPlaces + "} {1}", adjustedSize, SizeSuffixes[mag]);
        }

19 View Source File : ViewModel3DFactory.cs
License : MIT License
Project Creator : ABTSoftware

private static WaterfallDataSeries3D<double> GereplacederfallDataSeries()
        {
            var pointsPerSlice = 100;
            var sliceCount = 20;

            var logBase = 10;
            var slicePositions = new double[sliceCount];
            for (int i = 0; i < sliceCount; ++i)
            {
                slicePositions[i] = i;
            }

            var dataSeries = new WaterfallDataSeries3D<double>(pointsPerSlice, slicePositions);
            dataSeries.StartX = 10;
            dataSeries.StepX = 1;

            _transform.init((uint)Math.Log(pointsPerSlice, 2));

            var count = pointsPerSlice * 2;
            var re = new double[count];
            var im = new double[count];

            for (int sliceIndex = 0; sliceIndex < sliceCount; ++sliceIndex)
            {
                for (var i = 0; i < count; i++)
                {
                    re[i] = 2.0 * Math.Sin(2 * Math.PI * i / 20) +
                            5 * Math.Sin(2 * Math.PI * i / 10) +
                            2.0 * _random.NextDouble();
                    im[i] = -10;
                }

                _transform.run(re, im);

                var scaleCoef = Math.Pow(1.5, sliceIndex * 0.3) / Math.Pow(1.5, sliceCount * 0.3);
                for (var pointIndex = 0; pointIndex < pointsPerSlice; pointIndex++)
                {
                    var mag = Math.Sqrt(re[pointIndex] * re[pointIndex] + im[pointIndex] * im[pointIndex]);
                    var yVal = _random.Next(10, 20) * Math.Log10(mag / pointsPerSlice);
                    yVal = (yVal < -25 || yVal > -5)
                        ? (yVal < -25) ? -25 : _random.Next(-6, -3)
                        : yVal;

                    dataSeries[sliceIndex, pointIndex] = -yVal * scaleCoef;
                }
            }

            return dataSeries;
        }

19 View Source File : AttributesUtilityWindow.cs
License : GNU Lesser General Public License v3.0
Project Creator : ApexGameTools

private void OnEnable()
        {
            _lastEntry = -1;

            if (AttributesMaster.attributesEnabled)
            {
                var vals = Enum.GetValues(AttributesMaster.attributesEnumType);
                var names = Enum.GetNames(AttributesMaster.attributesEnumType);
                int idx = 0;
                foreach (int v in vals)
                {
                    var val = Math.Abs((long)v);
                    if (val > 0)
                    {
                        _lastEntry = (int)Math.Log(val, 2);
                        _entries[_lastEntry] = names[idx];
                    }

                    idx++;
                }

                _fileLocation = LocateAttributeFile();
            }
        }

19 View Source File : RangeAxis.cs
License : MIT License
Project Creator : AlexGyver

private double CalculateActualInterval2(double availableSize, double maxIntervalSize)
        {
            Func<double, double> Exponent = x => Math.Ceiling(Math.Log(x, 10));
            Func<double, double> Mantissa = x => x / Math.Pow(10, Exponent(x) - 1);

            // reduce intervals for horizontal axis.
            // double maxIntervals = Orientation == AxisOrientation.X ? MaximumAxisIntervalsPer200Pixels * 0.8 : MaximumAxisIntervalsPer200Pixels;
            // real maximum interval count
            double maxIntervalCount = availableSize / maxIntervalSize;

            double range = Math.Abs(ActualMinimum - ActualMaximum);
            double interval = Math.Pow(10, Exponent(range));
            double tempInterval = interval;

            // decrease interval until interval count becomes less than maxIntervalCount
            while (true)
            {
                int mantissa = (int)Mantissa(tempInterval);
                if (mantissa == 5)
                {
                    // reduce 5 to 2
                    tempInterval = RemoveNoiseFromDoubleMath(tempInterval / 2.5);
                }
                else if (mantissa == 2 || mantissa == 1 || mantissa == 10)
                {
                    // reduce 2 to 1,10 to 5,1 to 0.5
                    tempInterval = RemoveNoiseFromDoubleMath(tempInterval / 2.0);
                }

                if (range / tempInterval > maxIntervalCount)
                {
                    break;
                }

                interval = tempInterval;
            }
            return interval;
        }

19 View Source File : CellCostManager.cs
License : GNU Lesser General Public License v3.0
Project Creator : ApexGameTools

private void SetCost(CellCostType t, int cost)
        {
            var idx = (int)Math.Log((int)t, 2) + 1;
            _costs[idx] = cost;
        }

19 View Source File : TagCloudData.cs
License : MIT License
Project Creator : Adoxio

protected virtual IEnumerable<TagCloudDataItem> replacedignWeights(int numberOfWeights, IEnumerable<TagCloudDataItem> items)
		{
            // The call to Max on the next line will fail if there are no items,
            // so return if the collection is empty
            if (items.Count() == 0) return items;

			// Find the highest count in our collection--items with this count will have
			// the max weight (i.e., the value of the "weights" param)
			var maxFrequency = items.Max(item => item.TaggedItemCount);

			// Find the lowest count in our collection--items with this count will have a
			// weight of 1
			var minFrequency = items.Min(item => item.TaggedItemCount);

			// The size of each frequency threshold
			var delta = (maxFrequency - minFrequency) / (double)numberOfWeights;

			return items.Select(item =>
			{
				for (var weight = 1; weight <= numberOfWeights; weight++)
				{
					// We add 2 to each threshold and adjustedFrequency, to cancel out the
					// possibility of log(0) or log(1), which would have distorting effects

					var threshold = 100 * Math.Log((minFrequency + weight * delta) + 2);

					var adjustedFrequency = 100 * Math.Log(item.TaggedItemCount + 2);

					if (adjustedFrequency <= threshold)
					{
						item.Weight = weight;

						break;
					}
				}

				return item;
			});
		}

19 View Source File : FractalHeapHeader.cs
License : GNU Lesser General Public License v3.0
Project Creator : Apollo3zehn

private (uint Row, uint Column) Lookup(ulong offset)
        {
            uint row;
            uint column;

            if (offset < this.StartingBlockSize * this.TableWidth)
            {
                row = 0;
                column = (uint)(offset / this.StartingBlockSize);
            }
            else
            {
                var highBit = (uint)Math.Log(offset, 2);
                ulong offMask = (ulong)(1 << (int)highBit);
                row = highBit - this.FirstRowBits + 1;
                column = (uint)((offset - offMask) / this.RowBlockSizes[row]);
            }

            return (row, column);
        }

19 View Source File : Renderer.cs
License : MIT License
Project Creator : AliFlux

public async static Task<BitmapSource> Render(Style style, ICanvas canvas, int x, int y, double zoom, double sizeX = 512, double sizeY = 512, double scale = 1, List<string> whiteListLayers = null)
        {
            Dictionary<Source, Stream> rasterTileCache = new Dictionary<Source, Stream>();
            Dictionary<Source, VectorTile> vectorTileCache = new Dictionary<Source, VectorTile>();
            Dictionary<string, List<VectorTileLayer>> categorizedVectorLayers = new Dictionary<string, List<VectorTileLayer>>();

            double actualZoom = zoom;

            if (sizeX < 1024)
            {
                var ratio = 1024 / sizeX;
                var zoomDelta = Math.Log(ratio, 2);

                actualZoom = zoom - zoomDelta;
            }

            sizeX *= scale;
            sizeY *= scale;

            canvas.StartDrawing(sizeX, sizeY);

            var visualLayers = new List<VisualLayer>();

            // TODO refactor this messy block
            foreach (var layer in style.Layers)
            {
                if (whiteListLayers != null && layer.Type != "background" && layer.SourceLayer != "")
                {
                    if (!whiteListLayers.Contains(layer.SourceLayer))
                    {
                        continue;
                    }
                }
                if (layer.Source != null)
                {
                    if (layer.Source.Type == "vector")
                    {
                        if (!vectorTileCache.ContainsKey(layer.Source))
                        {
                            if (layer.Source.Provider is Sources.IVectorTileSource)
                            {
                                var tile = await (layer.Source.Provider as Sources.IVectorTileSource).GetVectorTile(x, y, (int)zoom);

                                if (tile == null)
                                {
                                    return null;
                                    // throwing exceptions screws up the performance
                                    throw new FileNotFoundException("Could not load tile : " + x + "," + y + "," + zoom + " of " + layer.SourceName);
                                }

                                // magic sauce! :p
                                if (tile.IsOverZoomed)
                                {
                                    canvas.ClipOverflow = true;
                                }

                                //canvas.ClipOverflow = true;

                                vectorTileCache[layer.Source] = tile;

                                // normalize the points from 0 to size
                                foreach (var vectorLayer in tile.Layers)
                                {
                                    foreach (var feature in vectorLayer.Features)
                                    {
                                        foreach (var geometry in feature.Geometry)
                                        {
                                            for (int i = 0; i < geometry.Count; i++)
                                            {
                                                var point = geometry[i];
                                                geometry[i] = new Point(point.X / feature.Extent * sizeX, point.Y / feature.Extent * sizeY);
                                            }
                                        }
                                    }
                                }

                                foreach (var tileLayer in tile.Layers)
                                {
                                    if (!categorizedVectorLayers.ContainsKey(tileLayer.Name))
                                    {
                                        categorizedVectorLayers[tileLayer.Name] = new List<VectorTileLayer>();
                                    }
                                    categorizedVectorLayers[tileLayer.Name].Add(tileLayer);
                                }
                            }
                        }
                    }
                    else if (layer.Source.Type == "raster")
                    {
                        if (!rasterTileCache.ContainsKey(layer.Source))
                        {
                            if (layer.Source.Provider != null)
                            {
                                if (layer.Source.Provider is Sources.ITileSource)
                                {
                                    var tile = await (layer.Source.Provider as Sources.ITileSource).GetTile(x, y, (int)zoom);

                                    if (tile == null)
                                    {
                                        continue;
                                        // throwing exceptions screws up the performance
                                        throw new FileNotFoundException("Could not load tile : " + x + "," + y + "," + zoom + " of " + layer.SourceName);
                                    }

                                    rasterTileCache[layer.Source] = tile;
                                }
                            }
                        }

                        if (rasterTileCache.ContainsKey(layer.Source))
                        {
                            if (style.ValidateLayer(layer, (int)zoom, null))
                            {
                                var brush = style.ParseStyle(layer, scale, new Dictionary<string, object>());

                                if (!brush.Paint.Visibility)
                                {
                                    continue;
                                }

                                visualLayers.Add(new VisualLayer()
                                {
                                    Type = VisualLayerType.Raster,
                                    RasterStream = rasterTileCache[layer.Source],
                                    Brush = brush,
                                });
                            }
                        }
                    }

                    if (categorizedVectorLayers.ContainsKey(layer.SourceLayer))
                    {
                        var tileLayers = categorizedVectorLayers[layer.SourceLayer];

                        foreach (var tileLayer in tileLayers)
                        {
                            foreach (var feature in tileLayer.Features)
                            {
                                //var geometry = localizeGeometry(feature.Geometry, sizeX, sizeY, feature.Extent);
                                var attributes = new Dictionary<string, object>(feature.Attributes);

                                attributes["$type"] = feature.GeometryType;
                                attributes["$id"] = layer.ID;
                                attributes["$zoom"] = actualZoom;

                                //if ((string)attributes["$type"] == "Point")
                                //{
                                //    if (attributes.ContainsKey("clreplaced"))
                                //    {
                                //        if ((string)attributes["clreplaced"] == "country")
                                //        {
                                //            if (layer.ID == "country_label")
                                //            {

                                //            }
                                //        }
                                //    }
                                //}

                                if (style.ValidateLayer(layer, actualZoom, attributes))
                                {
                                    var brush = style.ParseStyle(layer, scale, attributes);

                                    if (!brush.Paint.Visibility)
                                    {
                                        continue;
                                    }

                                    visualLayers.Add(new VisualLayer()
                                    {
                                        Type = VisualLayerType.Vector,
                                        VectorTileFeature = feature,
                                        Geometry = feature.Geometry,
                                        Brush = brush,
                                    });
                                }
                            }
                        }
                    }

                }
                else if (layer.Type == "background")
                {
                    var brushes = style.GetStyleByType("background", actualZoom, scale);
                    foreach (var brush in brushes)
                    {
                        canvas.DrawBackground(brush);
                    }
                }
            }

            // defered rendering to preserve text drawing order
            foreach (var layer in visualLayers.OrderBy(item => item.Brush.ZIndex))
            {
                if (layer.Type == VisualLayerType.Vector)
                {
                    var feature = layer.VectorTileFeature;
                    var geometry = layer.Geometry;
                    var brush = layer.Brush;

                    var attributesDict = feature.Attributes.ToDictionary(key => key.Key, value => value.Value);

                    if (!brush.Paint.Visibility)
                    {
                        continue;
                    }

                    try
                    {
                        if (feature.GeometryType == "Point")
                        {
                            foreach (var point in geometry)
                            {
                                canvas.DrawPoint(point.First(), brush);
                            }
                        }
                        else if (feature.GeometryType == "LineString")
                        {
                            foreach (var line in geometry)
                            {
                                canvas.DrawLineString(line, brush);
                            }
                        }
                        else if (feature.GeometryType == "Polygon")
                        {

                            foreach (var polygon in geometry)
                            {
                                canvas.DrawPolygon(polygon, brush);
                            }
                        }
                        else if (feature.GeometryType == "Unknown")
                        {
                            canvas.DrawUnknown(geometry, brush);
                        } else
                        {

                        }
                    }
                    catch (Exception)
                    {

                    }
                }
                else if (layer.Type == VisualLayerType.Raster)
                {
                    canvas.DrawImage(layer.RasterStream, layer.Brush);
                    layer.RasterStream.Close();
                }
            }

            foreach (var layer in visualLayers.OrderBy(item => item.Brush.ZIndex).Reverse())
            {
                if (layer.Type == VisualLayerType.Vector)
                {
                    var feature = layer.VectorTileFeature;
                    var geometry = layer.Geometry;
                    var brush = layer.Brush;

                    var attributesDict = feature.Attributes.ToDictionary(key => key.Key, value => value.Value);

                    if (!brush.Paint.Visibility)
                    {
                        continue;
                    }

                    if (feature.GeometryType == "Point")
                    {
                        foreach (var point in geometry)
                        {
                            if (brush.Text != null)
                            {
                                canvas.DrawText(point.First(), brush);
                            }
                        }
                    }
                    else if (feature.GeometryType == "LineString")
                    {
                        foreach (var line in geometry)
                        {
                            if (brush.Text != null)
                            {
                                canvas.DrawTextOnPath(line, brush);
                            }
                        }
                    }
                }
            }

            return canvas.FinishDrawing();
        }

19 View Source File : ExtensibleArrayHeader.cs
License : GNU Lesser General Public License v3.0
Project Creator : Apollo3zehn

public uint ComputeSecondaryBlockIndex(ulong index)
        {
            // H5EAdblock.c (H5EA__dblock_sblk_idx)

            /* Adjust index for elements in index block */
            index -= this.IndexBlockElementsCount;

            /* Determine the superblock information for the index */
            var tmp = index / this.DataBlockMininumElementsCount;
            var secondaryBlockIndex = (uint)Math.Log(tmp + 1, 2);

            return secondaryBlockIndex;
        }

19 View Source File : RealtimeWaterfall3DChart.xaml.cs
License : MIT License
Project Creator : ABTSoftware

private void OnLoaded(object sender, RoutedEventArgs routedEventArgs)
        {
            // Initialize FFT
            _transform.init((uint) Math.Log(_pointsPerSlice, 2));
            _transformSize = _pointsPerSlice * 2;

            _real = new double[_transformSize];
            _imaginary = new double[_transformSize];

            // Initialize WaterfallDataSeries3D
            _waterfallDataSeries = new WaterfallDataSeries3D<double>(_pointsPerSlice, _maxSliceCount)
            {
                StartX = 10,
                StepX = 1,
                StartZ = 25,
                StepZ = 10
            };

            WaterfallSeries.DataSeries = _waterfallDataSeries;
            MeshSeries.DataSeries = _waterfallDataSeries;
        }

19 View Source File : H5Utils.cs
License : GNU Lesser General Public License v3.0
Project Creator : Apollo3zehn

public static uint ComputeChunkSizeLength(ulong chunkSize)
        {
            // H5Dearray.c (H5D__earray_crt_context)
            /* Compute the size required for encoding the size of a chunk, allowing
             *      for an extra byte, in case the filter makes the chunk larger.
             */
            var chunkSizeLength = 1 + ((uint)Math.Log(chunkSize, 2) + 8) / 8;

            if (chunkSizeLength > 8)
                chunkSizeLength = 8;

            return chunkSizeLength;
        }

19 View Source File : OceanRenderer.cs
License : MIT License
Project Creator : AlphaMistral

private void GenerateTexture()
	{
		float deltaTime = Time.deltaTime;

		currentPhase = !currentPhase;
		RenderTexture rt = currentPhase ? pingPhaseTexture : pongPhaseTexture;
		dispersionMat.SetTexture("_Phase", currentPhase? pongPhaseTexture : pingPhaseTexture);
		dispersionMat.SetFloat("_DeltaTime", deltaTime * mult);
		Graphics.Blit(null, rt, dispersionMat);

		spectrumMat.SetTexture("_Phase", currentPhase? pingPhaseTexture : pongPhaseTexture);
		Graphics.Blit(null, spectrumTexture, spectrumMat);

		fftMat.EnableKeyword("_HORIZONTAL");
		fftMat.DisableKeyword("_VERTICAL");
		int iterations = Mathf.CeilToInt((float)Math.Log(resolution * 8, 2)) * 2;
		for (int i = 0; i < iterations; i++)
		{
			RenderTexture blitTarget;
			fftMat.SetFloat("_SubTransformSize", Mathf.Pow(2, (i % (iterations / 2)) + 1));
			if (i == 0)
			{
				fftMat.SetTexture("_Input", spectrumTexture);
				blitTarget = pingTransformTexture;
			}
			else if (i == iterations - 1)
			{
				fftMat.SetTexture("_Input", (iterations % 2 == 0) ? pingTransformTexture : pongTransformTexture);
				blitTarget = displacementTexture;
			}
			else if (i % 2 == 1)
			{
				fftMat.SetTexture("_Input", pingTransformTexture);
				blitTarget = pongTransformTexture;
			}
			else
			{
				fftMat.SetTexture("_Input", pongTransformTexture);
				blitTarget = pingTransformTexture;
			}
			if (i == iterations / 2)
			{
				fftMat.DisableKeyword("_HORIZONTAL");
				fftMat.EnableKeyword("_VERTICAL");
			}
			Graphics.Blit(null, blitTarget, fftMat);
		}

		heightMat.SetTexture("_Phase", currentPhase? pingPhaseTexture : pongPhaseTexture);
		Graphics.Blit(null, spectrumTexture, heightMat);
		fftMat.EnableKeyword("_HORIZONTAL");
		fftMat.DisableKeyword("_VERTICAL");
		for (int i = 0; i < iterations; i++)
		{
			RenderTexture blitTarget;
			fftMat.SetFloat("_SubTransformSize", Mathf.Pow(2, (i % (iterations / 2)) + 1));
			if (i == 0)
			{
				fftMat.SetTexture("_Input", spectrumTexture);
				blitTarget = pingTransformTexture;
			}
			else if (i == iterations - 1)
			{
				fftMat.SetTexture("_Input", (iterations % 2 == 0) ? pingTransformTexture : pongTransformTexture);
				blitTarget = heightTexture;
			}
			else if (i % 2 == 1)
			{
				fftMat.SetTexture("_Input", pingTransformTexture);
				blitTarget = pongTransformTexture;
			}
			else
			{
				fftMat.SetTexture("_Input", pongTransformTexture);
				blitTarget = pingTransformTexture;
			}
			if (i == iterations / 2)
			{
				fftMat.DisableKeyword("_HORIZONTAL");
				fftMat.EnableKeyword("_VERTICAL");
			}
			Graphics.Blit(null, blitTarget, fftMat);
		}

		normalMat.SetTexture("_DisplacementMap", displacementTexture);
		normalMat.SetTexture("_HeightMap", heightTexture);
		Graphics.Blit(null, normalTexture, normalMat);
		whiteMat.SetTexture("_Displacement", displacementTexture);
		whiteMat.SetTexture("_Bump", normalTexture);
		whiteMat.SetFloat("_Resolution", resolution * 8);
		whiteMat.SetFloat("_Length", resolution);
		Graphics.Blit(null, whiteTexture, whiteMat);
		if (!saved)
		{
			oceanMat.SetTexture("_Anim", displacementTexture);
			oceanMat.SetTexture("_Bump", normalTexture);
			oceanMat.SetTexture("_White", whiteTexture);
			oceanMat.SetTexture("_Height", heightTexture);
			saved = true;
		}
	}

19 View Source File : DiscordApplication.cs
License : MIT License
Project Creator : Aiko-IT-Systems

public string GetAvatarUrl(ImageFormat fmt, ushort size = 1024)
        {
            if (fmt == ImageFormat.Unknown)
                throw new ArgumentException("You must specify valid image format.", nameof(fmt));

            if (size < 16 || size > 2048)
                throw new ArgumentOutOfRangeException(nameof(size));

            var log = Math.Log(size, 2);
            if (log < 4 || log > 11 || log % 1 != 0)
                throw new ArgumentOutOfRangeException(nameof(size));

            var sfmt = "";
            sfmt = fmt switch
            {
                ImageFormat.Gif => "gif",
                ImageFormat.Jpeg => "jpg",
                ImageFormat.Auto or ImageFormat.Png => "png",
                ImageFormat.WebP => "webp",
                _ => throw new ArgumentOutOfRangeException(nameof(fmt)),
            };

19 View Source File : Mathd.cs
License : MIT License
Project Creator : 734843327

public static double Log(double d, double p) {
            return Math.Log(d, p);
        }

19 View Source File : CreateAWaterfall3DChart.xaml.cs
License : MIT License
Project Creator : ABTSoftware

private void OnLoaded(object sender, RoutedEventArgs routedEventArgs)
        {
            var pointsPerSlice = 100;
            var sliceCount = 20;

            var logBase = 10;
            var slicePositions = new double[sliceCount];

            for (int i = 0; i < sliceCount; ++i)
            {
                slicePositions[i] = Math.Pow(logBase, i);
            }

            var dataSeries = new WaterfallDataSeries3D<double>(pointsPerSlice, slicePositions)
            {
                SeriesName = "Waterfall",
                StartX = 10,
                StepX = 1
            };

            _transform.init((uint)Math.Log(pointsPerSlice, 2));

            FillDataSeries(dataSeries, sliceCount, pointsPerSlice);
            WaterfallSeries.DataSeries = dataSeries;
        }

19 View Source File : CreateInvertedIndex.cs
License : MIT License
Project Creator : ABTSoftware

public static void CreateIndexForCode(IEnumerable<KeyValuePair<Guid, Example>> examples)
        {
            var ex = examples.ToList();

            foreach (var example in ex)
            {
                var tokenizer = new NGramTokenizer();

                string lines = GetSourceCodeFromExample(example.Value);
                var terms = lines.ToLower().Split(' ').Where(x => x != "")
                    .Select(tokenizer.Tokenize)
                    .SelectMany(strings => strings.SelectMany(inner => inner))                                        
                    .Select(sb => sb.ToString())
                    .Where(s => !string.IsNullOrEmpty(s) && s.Length > 1)
                    .ToList();

                // Memory optimisation. Store term indices as ushort (16bit)
                if (terms.Count > ushort.MaxValue)
                    throw new InvalidOperationException("Too many code terms for example: " + example.Value.replacedle);

                var termDictExample = new Dictionary<string, List<ushort>>();
                for (ushort i = 0; i < terms.Count; i++)
                {
                    var term = terms[i];
                    if (termDictExample.ContainsKey(term))
                    {
                        termDictExample[term].Add(i);
                    }
                    else
                    {
                        termDictExample[term] = new List<ushort> { i };
                    }
                }

                var norm = Math.Sqrt(termDictExample.Sum(termDict => Sqr(termDict.Value.Count)));

                foreach (var termDict in termDictExample)
                {
                    var term = termDict.Key;
                    var list = termDict.Value;

                    if (_codeInvertedIndex.ContainsKey(term))
                    {
                        var ti = new TermInfo(example.Key, termDict.Value.ToArray(), (float) (termDict.Value.Count / norm));
                        _codeInvertedIndex[term].TermInfos.Add(ti);
                    }
                    else
                    {
                        var ti = new TermInfo(example.Key, termDict.Value.ToArray(), (float)(termDict.Value.Count / norm));
                        _codeInvertedIndex[term] = new Posting(new List<TermInfo>
                        {
                            ti,
                        });
                    }
                    _codeInvertedIndex[term].InvertedDoreplacedentFrequency += 1;
                }
                
            }

            _codeInvertedIndex.ForEachDo(x =>
            {
                x.Value.InvertedDoreplacedentFrequency = Math.Log(ex.Count/x.Value.InvertedDoreplacedentFrequency);

                // Collapse memory of List<TermInfo>
                x.Value.TermInfos = x.Value.TermInfos.ToList();
            });
        }

19 View Source File : Program.cs
License : Apache License 2.0
Project Creator : ajuna-network

private static void EraTesting()
        {
            var t1 = Era.Decode(Utils.HexToByteArray("0x1503"));
            Console.WriteLine($"NODE: {t1}");

            var t2 = Era.Decode(Utils.HexToByteArray("0xD503"));
            Console.WriteLine($" API: {t2}");

            var t3 = Era.Create(64, 15793);
            Console.WriteLine($" API: {t3}");

            ulong currentBlockNumber = (ulong)15689;
            var lastBit = currentBlockNumber & (ulong)-(long)currentBlockNumber;
            var nextPowerOf2 = Math.Pow(2, Math.Round(Math.Log(15689, 2)));
            Console.WriteLine($"currentBlockNumber[{currentBlockNumber}]: {Math.Round(Math.Log(15689, 2))} {nextPowerOf2}");
        }

19 View Source File : StudentDistribution.cs
License : MIT License
Project Creator : AndreyAkinshin

public double Pdf(double x)
        {
            double df2 = (df + 1) / 2;
            
            // Ln( Г((df + 1) / 2) / Г(df / 2) )
            double term1 = GammaFunction.LogValue(df2) - GammaFunction.LogValue(df / 2);

            // Ln( (1 + x^2 / df) ^ (-(df + 1) / 2) )
            double term2 = Log(1 + x.Sqr() / df) * -df2;
            
            return Exp(term1 + term2) / Sqrt(PI * df);
        }

See More Examples