SavitzkyGolay Class

Class generates the Savitzy-Golay filter coefficients for smoothing data or computing smoothed derivatives. Smoothed derivatives can be found up to the order of the fitting polynomial.

Inheritance Hierarchy

SystemObject
CenterSpace.NMath.CoreSavitzkyGolay

Namespace: CenterSpace.NMath.Core
Assembly: NMath (in NMath.dll) Version: 7.3

Syntax

C++

Copy

[SerializableAttribute]
public class SavitzkyGolay : ICloneable

<SerializableAttribute>
Public Class SavitzkyGolay
	Implements ICloneable

[SerializableAttribute]
public ref class SavitzkyGolay : ICloneable

[<SerializableAttribute>]
type SavitzkyGolay =  
    class
        interface ICloneable
    end

The SavitzkyGolay type exposes the following members.

Constructors

	Name	Description
	SavitzkyGolay	Constructs a SavitzkyGolay classes to generate Savitzky-Golay derived coefficients. Number of points to the left and right both default to two. The fitting polynomial degree defaults to three.
	SavitzkyGolay(Int32, Int32, Int32)	Constructs a Savitzky-Golay helper class to generate Savitzky-Golay filtering coefficients.

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Properties

	Name	Description
	NumberCoefficients	Gets the number of Savitzky-Golay coefficients generated
	NumberLeft	Gets the number of points left for the filter window.
	NumberRight	Gets the number of points right for the filter window.
	PolynomialDegree	Gets the fitting polynomial degree.

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Methods

	Name	Description
	BuildBoundaryDerivatives	Builds the boundary points derivatives by sliding the center point of the filter towards each end of the data vectors. The filter length and polynomial degree are maintained.
	Clone	Creates a deep copy of this SavitzkyGolay instance.
	SavitzkyGolayFirstDerivativeCoefficients	Constructs the coefficient for a Savitzky-Golay first derivative filter when used with the MovingWindowFilter class.
	SavitzkyGolayNthDerivativeCoefficients	Constructs the coefficient for the Savitzky-Golay Nth derivative filter when used with the MovingWindowFilter class. The order must be less than or equal to the polynomial degree.
	SavitzkyGolaySmoothingCoefficients	Constructs the coefficient vector that creates a Savitzky-Golay smoothing filter when used with the MovingWindowFilter class.

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Examples

int nL = 2, nR = 2, m = 2; SavitzkyGolay sg = new SavitzkyGolay(nL, nR, m); DoubleVector coeffs = sg.SavitzkyGolayFirstDerivativeCoefficients();

Reference

CenterSpace.NMath.Core Namespace