GInterpolation.hh File Reference

#include <math.h>
#include "GGlobal.hh"
#include "GBaseFunctions.hh"
#include "GLogMessage.hh"

Go to the source code of this file.

Functions
int	GArrayInterpolationLinear (const u_int Nin, const double Yin[], const u_int Nout, double Yout[], const double X0, const double dX)
int	GArrayInterpolationLinear (const u_int Nin, const double Yin[], const double Xin0, const double dXin, const u_int Nout, double Yout[], const double Xout0, const double dXout)
int	GArrayInterpolationCubic (const u_int Nin, const double Yin[], const u_int Nout, double Yout[], const double X0, const double dX)
int	GArrayInterpolationCubic (const u_int Nin, const double Yin[], const double Xin0, const double dXin, const u_int Nout, double Yout[], const double Xout0, const double dXout)

Detailed Description

Include file for interpolation functions.

Function Documentation

int GArrayInterpolationCubic	(	const u_int	Nin,
		const double	Yin[],
		const u_int	Nout,
		double	Yout[],
		const double	X0,
		const double	dX
	)

Computes the output array Yout from a cubic interpolation of the input array Yin.

The input array is interpreted as a serie of Nin points with coordinates (x,y) = ( i, Yin[i] ), which means the fist point is at X=0 and the step on the X axis is 1. The output array as points with coordinates (x,y) = ( X0+j*dX, Yout[j] ).

If some of the output points are outside the input range [0:Nin-1], the result for those points will be an extrapolation from the first or last interval.

The function returns 0 if no error occured. The input array must have a dimension of at least 2, and the output one must be at leat 1 point.

Parameters

Nin	size of the input array
Yin	input array
Nout	size of the output array
Yout	output array
X0	X-position of the first point of the output array
dX	output array step value

References GLogWarning().

Referenced by GArrayInterpolationCubic(), GRealSampleFFT::InterpolateFrom(), and GRealSampleFFT::SetTimeResponse().

int GArrayInterpolationCubic	(	const u_int	Nin,
		const double	Yin[],
		const double	Xin0,
		const double	dXin,
		const u_int	Nout,
		double	Yout[],
		const double	Xout0,
		const double	dXout
	)

Computes the output array Yout from a cubic interpolation of the input array Yin.

The input array is interpreted as a serie of Nin points with coordinates (x,y) = ( Xin0+j*dXin, Yin[i] ). The output array as points with coordinates (x,y) = ( Xout0+j*dXout, Yout[j] ).

If some of the output points are outside the input range [0:Nin-1], the result for those points will be an extrapolation from the first or last interval.

The function returns 0 if no error occured. The input array must have a dimension of at least 2, and the output one must be at leat 1 point.

Parameters

Nin	size of the input array
Yin	input array
Xin0	X-position of the first point of the input array
dXin	input array step value
Nout	size of the output array
Yout	output array
Xout0	X-position of the first point of the output array
dXout	output array step value

References GArrayInterpolationCubic(), and GLogWarning().

int GArrayInterpolationLinear	(	const u_int	Nin,
		const double	Yin[],
		const u_int	Nout,
		double	Yout[],
		const double	X0,
		const double	dX
	)

Computes the output array Yout from a linear interpolation of the input array Yin.

The input array is interpreted as a serie of Nin points with coordinates (x,y) = ( i, Yin[i] ), which means the fist point is at X=0 and the step on the X axis is 1. The output array as points with coordinates (x,y) = ( X0+j*dX, Yout[j] ).

If some of the output points are outside the input range [0:Nin-1], the result for those points will be an extrapolation from the first or last interval.

The function returns 0 if no error occured. The input array must have a dimension of at least 2, and the output one must be at leat 1 point.

Parameters

Nin	size of the input array
Yin	input array
Nout	size of the output array
Yout	output array
X0	X-position of the first point of the output array
dX	output array step value

References GLogWarning().

Referenced by GArrayInterpolationLinear(), GRealSampleFFT::InterpolateFrom(), and GRealSampleFFT::SetTimeResponse().

int GArrayInterpolationLinear	(	const u_int	Nin,
		const double	Yin[],
		const double	Xin0,
		const double	dXin,
		const u_int	Nout,
		double	Yout[],
		const double	Xout0,
		const double	dXout
	)

Computes the output array Yout from a linear interpolation of the input array Yin.

The input array is interpreted as a serie of Nin points with coordinates (x,y) = ( Xin0+j*dXin, Yin[i] ). The output array as points with coordinates (x,y) = ( Xout0+j*dXout, Yout[j] ).

If some of the output points are outside the input range [0:Nin-1], the result for those points will be an extrapolation from the first or last interval.

The function returns 0 if no error occured. The input array must have a dimension of at least 2, and the output one must be at leat 1 point.

Parameters

Nin	size of the input array
Yin	input array
Xin0	X-position of the first point of the input array
dXin	input array step value
Nout	size of the output array
Yout	output array
Xout0	X-position of the first point of the output array
dXout	output array step value

References GArrayInterpolationLinear(), and GLogWarning().