2.1.22.2.2.4 fft_bandpass

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

Description

Performs band pass filtering of signal. The filtering is performed by using FFT functions.

Syntax

int fft_bandpass( Curve & crvSignal, double dFLow, double dFHigh, bool bAddOffset = true )

int fft_bandpass( vector & vecSignal, double dFLow, double dFHigh, vector * vecTime = NULL, bool bAddOffset = true )

Parameters

crvSignal: [modify] Input: signal data; Output: filtered signal
dFLow: [Input] lower cutoff frequency
dFHigh: [Input] higher cutoff frequency
bAddOffset: [Input] add back DC offset after filtering(true) or not (false).; default is true.

vecSignal: [modify] Input: signal data; Output: filtered signal
dFLow: [Input] lower cutoff frequency
dFHigh: [Input] higher cutoff frequency
vecTime: [Input] frequence sequence of signal. default is NULL.
bAddOffset: [Input] add back DC offset after filtering(true) or not (false).; default is true.

Return

OE_NOERROR: success

positive: FFT error code

OE_NOERROR: success

positive: FFT error code

Examples

EX1

//Before compile this example, run the following LabTalk command in Command Window:
// 		run.LoadOC("Originlab\fft_utils.c", 16);
 
#include <fft_utils.h> 
void fft_bandpass_ex1()
{
    double dFLow = 1.0, dFHigh = 6.5;
    vector vecX ;
    vector vecY;
    vecX.Data(1.0,10.0,1.0);
    vecY.Normal(10);
    Curve crvSignal(vecX, vecY);
    int iRet = fft_bandpass(crvSignal, dFLow, dFHigh);
}

EX2

//Before compile this example, run the following LabTalk command in Command Window:
// 		run.LoadOC("Originlab\fft_utils.c", 16);
 
#include <fft_utils.h> 
void fft_bandpass_ex2()
{
    double dFLow = 1.0, dFHigh = 6.5;
    vector vecX;
    vector vecY;
    vecX.Data(1.0,10.0,1.0);
    vecY.Normal(10);
    int iRet = fft_bandpass(vecY, dFLow, dFHigh, &vecX);
}