JSVD3D.cc

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#include <string>
#include <iostream>
#include <iomanip>
 
#include "TRandom3.h"
 
#include "JMath/JMath.hh"
#include "JMath/JSVD3D.hh"
#include "JMath/JMathTestkit.hh"
 
#include "Jeep/JParser.hh"
#include "Jeep/JMessage.hh"
 
 
int main(int argc, char**argv)
{
  using namespace std;
  using namespace JPP;
 
  double precision;
  int    debug;
 
  try {
 
    JParser<> zap;
 
    zap['e'] = make_field(precision)      = 1.0e-3;
    zap['d'] = make_field(debug)          = 3;
 
    zap(argc, argv);
  }
  catch(const exception &error) {
    FATAL(error.what() << endl);
  }
 
 
  gRandom->SetSeed(0);
 
 
  JMatrix3D A = getRandom<JMatrix3D>();
 
  JSVD3D svd;
 
  svd.decompose(A);
 
  DEBUG("A" << endl << A     << endl);
  DEBUG("U" << endl << svd.U << endl);
  DEBUG("S" << endl << svd.S << endl);
  DEBUG("V" << endl << svd.V << endl);
 
  JMatrix3D C = svd.invert();
 
  C *= A;
 
  DEBUG("C" << endl << C << endl);
 
  ASSERT(C.isIdentity(precision));
 
  return 0;
}