/usr/share/doc/mffm-fftw-dev/examples/complexFFTExample.cc is in mffm-fftw-dev 1.7-3ubuntu1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 | /* Copyright 2001,2002 Matt Flax <flatmax@ieee.org>
This file is part of the MFFM FFTw Wrapper library.
MFFM MFFM FFTw Wrapper library is free software; you can
redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
MFFM FFTw Wrapper library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You have received a copy of the GNU General Public License
along with the MFFM FFTw Wrapper library
*/
#include <fstream>
#include <iostream>
using namespace std;
#include "complexFFT.H"
//#include <iomanip.h>
int main (){
int count =8;
complexFFTData fftData(count);
complexFFT fft(&fftData);
for (int i=0;i<count;i++){
c_re(fftData.in[i])=(double)i;
// fftData.in[i].im=(double)-i;
c_im(fftData.in[i])=(double)i+5.0;
}
fftw_real *temp=&c_re(fftData.in[0]);
for (int i=0; i<count; i++)
cout << temp[i]<<endl;
// forward transform :
fft.fwdTransform();
// inverse transform :
fft.invTransform();
// for (int i=0; i<count; i++)
// cout << fftData.in[i].re<<' '<<fftData.in[i].im<<endl;
// Find the power spectrum ...
fftData.compPowerSpec();
for (int i=0; i<count; i++)
cout << fftData.power_spectrum[i]<<endl;
}
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