2.1.22.2.2.1 fftw_create_window_data

Description

Generate window signal.

Syntax

int fftw_create_window_data( int nSize, double * vWindow, int nWindowMethod = RECTANGLE_WIN, double dAlpha = 0, double dBeta = 0 )

Parameters

nSize

[input] number of points of the window

vWindow

[output] the result of window signal

nWindowMethod

[input] the window method, now it can be one of the following

RECTANGLE_WIN = 0, Create a Rectangle Window

WELCH_WIN, Create a Welch Window

TRIANGULAR_EIN, Create a Triangular Window

BARTLETT_WIN, Create a Bartlett Window

HANNING_WIN, Create a Hanning Window

HAMMING_WIN, Create a Hamming Window

BLACKMAN_WIN, Create a Blackman Window

GAUSSIAN_WIN, Create a Gaussian Window

KAISER_WIN, Create a Kaiser Window

PARZEN_WIN, Create a Parzen Window

dAlpha

[input]Alpha value for Gaussian window, As Alpha increases, the width of the Gaussian window will decrease

dBeta

[input]Belta value for Kaiser window

Return

Returns 0 for success or error codes for failure.

Examples

EX1

#include <..\OriginLab\fft.h>
void fftw_create_window_data_ex1()
{
    vector vWin(8);
    fftw_create_window_data(8, vWin, HAMMING_WIN);
}

Remark

See Also

Header to Include

fft.h

Reference