fft_unwrap_phase

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

Description

Calculate the change in phi and add it to the previous phase.

Syntax

int fft_unwrap_phase( vector & vPhase )

Parameters

vPhase: [modify] the data for input, and the result of phase after transform for output

Return

Returns OE_NOERROR for success or error codes for failure.

Examples

Prior to compilation, load fft_utils.c to the workspace by executing the following LabTalk command:

Run.LoadOC("Originlab\fft_utils.c", 16);

To retain fft_utils.c in the workspace for successive sessions, drag and drop the file from the Temporary folder to the System folder.

EX1

 
#include <fft_utils.h> 
void fft_unwrap_phase_ex1()
{
    vector<complex> vSignal = {36, -4 + 9.6569i, -4 + 4i, -4 + 1.6569i,
        -4,    -4 - 1.6569i, -4 - 4i, -4 - 9.6569i};
    vector vPhase;
    vSignal.GetPhase(vPhase);
    
    //the result should be 
    //vPhase = {0, 1.9634, 2.3561, 2.7488, 3.1415, -2.7488, -2.3561, -1.9634}
    int nRet = fft_unwrap_phase(vPhase);
    if( 0 != nRet )
    {
        printf("fft_unwrap_phase function returned error: %d\n", nRet);
        return;
    }
}