SharpPlot 2.20: VectorMath Class

Reference > VectorMath Class

VectorMath Class

This class provides a convenient library of static methods for transforming array data.

public class VectorMath

VectorMath Methods

Difference	Compute the first difference of an integer vector
Divide	Divide two integer vectors
Drop	Create an integer vector by removing count items from an existing integer vector
ExponentialSmooth	Simple exponential smooth of existing vector with given smoothing constant
Max	The largest item in an integer vector
Min	The smallest item in an integer vector
MovingAverage	Moving average of an integer vector given period and pad value
MovingTotal	Moving total of an integer vector given period and pad value
Multiply	Multiply two integer vectors
Negate	The negative values of an integer vector
Pow	Raise an integer vector to a given power
Range	Generate indices from start up to end
Reciprocal	The inverse values of an integer vector
RunningMax	Running maximum of an integer vector
RunningMin	Running minimum of an integer vector
RunningTotal	Running total of an integer vector
Sqrt	Square root of an integer vector
Subtract	Subtract two integer vectors
Sum	Add two integer vectors
Tail	Create an integer vector from the last elements of existing integer vector and new element count
Take	Create an integer vector from an existing integer vector and new element count
Total	Total of an integer vector

Example

Typically you may want to combine several variables in a Scatterplot, or draw a timeseries with a moving average.

BP = new int[] {427,428,427,429,424,418,420,424,416,410,406,409,403,395,389,380,374,369,
  356,362,383,383,382,393,386,398,382,379,380,394,385,381,388,396,404,393,400,413,417,
  414,402,400,400,408,408,406,405,395,392,395,371,392,400,415,413,414,417,428,416,422,
  429,416,414,401,416,406,407,416,421,411,412,406,405,408,414,407,408,414,412,406,395,
  403,400,397,395,405,411,414,408};
  
pad = sp.MissingValue;
mav12 = VectorMath.MovingAverage(BP,12,pad);
mav20 = VectorMath.MovingAverage(BP,20,pad);

sp.LineGraphStyle = LineGraphStyles.Markers|LineGraphStyles.NoLines;
sp.SetMarkers(Marker.Dot);

sp.DrawLineGraph(BP);

sp.SetLineStyles(LineStyle.Solid);

sp.LineGraphStyle = 0;
sp.DrawLineGraph(new double[][]{mav12,mav20});

See the tutorial topics on data transformations.

Requirements

Namespace: Causeway

Assembly: SharpPlot (in sharpplot.dll)