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# complexFFTExample.cc

This is an example of how to use the class.

    /* 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 <iomanip>

    #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;
    }