fft_fft_filter

1 Description
2 Syntax
3 Parameters
4 Return
5 Examples
6 Remark
7 See Also
8 header to Include
9 Reference

Description

Apply the window function on the frequency-domain of the signal.

Syntax

int fft_fft_filter(int iSize, double *vSig, double *vWindow);

Parameters

iSize: [input] the number of data values in both signal and window function.
vSig: [modify] Input: the signal sequence. Output: the result signal after applying the window.
vWindow: [Input] the window sequence.

Return

Returns 0 for success or error codes for failure.

Examples

EX1

//Assume the current Worksheet has 2 columns. This piece of code filters the data in the
//first column using the window sequence in the second column. The result is output
//into the third column.

#include <..\OriginLab\fft.h>
void fft_fft_filter_ex1()
{
        int n=8, success;
        Worksheet wks = Project.ActiveLayer();
        if(wks)
        {
                Dataset xx(wks, 0);
                Dataset yy(wks, 1);
                Dataset aa(wks, 2);
        
                vector x = xx;
                vector y = yy;
                        
                success = fft_fft_filter(n, x, y);
                aa = x;
        }
}