JTransformableFunction.cc File Reference

Example program to test transformable function. More...

#include <string>
#include <iostream>
#include <iomanip>
#include "TMath.h"
#include "TRandom.h"
#include "JTools/JFunction1D_t.hh"
#include "JTools/JTransformableMultiFunction.hh"
#include "JTools/JFunctionalMap_t.hh"
#include "JTools/JStats.hh"
#include "Jeep/JPrint.hh"
#include "Jeep/JParser.hh"
#include "Jeep/JMessage.hh"

Go to the source code of this file.

Functions
int	main (int argc, char **argv)

Detailed Description

Example program to test transformable function.

Author

mdejong

Definition in file JTransformableFunction.cc.

Function Documentation

main()

int main	(	int	argc,
		char **	argv )

Definition at line 163 of file JTransformableFunction.cc.

{
  using namespace std;
  using namespace JPP;
 
  int     numberOfEvents;
  int     numberOfBins;
  bool    transform;
  int     debug;
 
  try {
 
    JParser<> zap("Example program to test transformable function.");
 
    zap['n'] = make_field(numberOfEvents);
    zap['N'] = make_field(numberOfBins)   = 35;
    zap['U'] = make_field(transform);
    zap['d'] = make_field(debug)          = 3;
 
    zap(argc, argv);
  }
  catch(const exception &error) {
    FATAL(error.what() << endl);
  }
 
  if (numberOfEvents <= 0) {
    FATAL("No events." << endl);
  }
 
 
  const double xmin = 0.1;
  const double xmax = 1.0;
  const double dx   = (xmax - xmin) / 3;
 
  function_type h2;
 
  for (double x = xmin; x < xmax + 0.5*dx; x += dx) {
 
    const double ymin = -5.0 * xmax;
    const double ymax = +5.0 * xmax;
    const double dy   = (ymax - ymin) / (numberOfBins - 1);
 
    for (double y = ymin; y < ymax + 0.5*dy; y += dy) {
      h2[x][y] = f2(x,y);
    }
  }
 
  h2.setExceptionHandler(new typename function_type::JDefaultResult(JMATH::zero));
 
  if (transform) {
    h2.transform(JTransformer_t());
  }
 
  h2.compile();
 
 
  JStats Q[] = {
    JStats("function"),
    JStats("derivative"),
    JStats("integral")
  };
  
  const double ymin = -5.0 * xmax;
  const double ymax = +5.0 * xmax;
 
  for (int i = 0; i != numberOfEvents; ++i) {
      
    const double x = gRandom->Uniform(xmin, xmax);
    const double y = gRandom->Uniform(ymin, ymax);
    
    try {
      
      const result_type value = h2(x,y);
 
      const double f  = f2(x,y);
      const double fp = g2(x,y);
      const double v  = G2(x,y);
 
      Q[0].put(value.f  - f);
      Q[1].put(value.fp - fp);
      Q[2].put(value.v  - v);
    }
    catch(const std::exception& error) {}
  }
 
    
  if (debug >= notice_t) {
 
    cout << "     ";
    for (int i = 0; i != sizeof(Q)/sizeof(Q[0]); ++i) {
      cout << "  " << setw(10) << Q[i].getTitle();
    }
    cout << endl;
 
    cout << "mean ";
    for (int i = 0; i != sizeof(Q)/sizeof(Q[0]); ++i) {
      cout << "  " << SCIENTIFIC(10,2) << Q[i].getMean();
    }
    cout << endl;
 
    cout << "RMS  ";
    for (int i = 0; i != sizeof(Q)/sizeof(Q[0]); ++i) {
      cout << "  " << SCIENTIFIC(10,2) << Q[i].getSTDev();
    }
    cout << endl;
  }
}