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SignalUtils.MovingAverageFilter Method

Filter data with a moving average filter.

Syntax
C#
Visual Basic
public static void MovingAverageFilter(TVec Data, int MaskSize, int DataIndex, int Len);

Applies moving average filter to Data from DataIndex to DataIndex+Len. Set Len to -1 to use the full Data length. MaskSize defines the length of the filter in samples. This MovingAverageFilter routine can be used to filter a block of data (not for streaming).

Moving average filter applied to a sine signal.

using Dew.Math; using Dew.Math.Editors; using Dew.Math.Units; using Dew.Signal; using Dew.Signal.Units; using Dew.Math.Tee; using Dew.Signal.Tee; private void button1_Click(object sender, EventArgs e) { Vector b = new Vector(0); Vector c = new Vector(0); b.Size(300); SignalUtils.Tone(b, 300, 5.0 / 300, 0, 1, false); c.Copy(b); SignalUtils.MovingAverageFilter(b, 20, 0, Math387.MtxVecEOA); //from Index 0 to EndOfArray MtxVecTee.DrawIt(new TVec[2] { c, b }, new string[2] { "Unfiltered", "Filtered" }, "Moving average filter", false); }
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