JSpectrum.cc

Go to the documentation of this file.

#include <string>
#include <iostream>
#include <fstream>
#include <iomanip>
#include <cmath>

#include "JLang/gzstream.h"
#include "JMath/JConstants.hh"

#include "Jeep/JeepToolkit.hh"
#include "Jeep/JParser.hh"
#include "Jeep/JMessage.hh"


/**
 * \file
 * Auxiliary program to generate spectrum for fast Fourier transformation.
 *
 * \author mdejong
 */
int main(int argc, char **argv)
{
  using namespace std;
  using namespace JPP;

  string  outputFile;
  size_t  numberOfPoints;
  double  frequency;
  double  binWidth;
  int     debug;

  try { 

    JParser<> zap("Auxiliary program to generate spectrum for fast Fourier transformation.");
    
    zap['o'] = make_field(outputFile)      = "waveform.txt";
    zap['n'] = make_field(numberOfPoints);
    zap['F'] = make_field(frequency);
    zap['B'] = make_field(binWidth);
    zap['d'] = make_field(debug)           = 2;
    
    zap(argc, argv);
  }
  catch(const exception& error) {
    FATAL(error.what() << endl);
  }

  // output

  ostream* out = open<ostream>(outputFile.c_str());

  for (size_t i = 0; i != numberOfPoints; ++i) {

    const double x = i * binWidth;
    const double y = sin(x * 2*PI * frequency);

    *out << SCIENTIFIC(9,6) << y << endl;
  }

  close(out);  
}