StatVal.h

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/* emacs: this is -*- c++ -*- */
 
 
#ifndef RESPLOT_STATVAL_H
#define RESPLOT_STATVAL_H
 
#include <iostream>
#include <iomanip>
#include <cmath>
 
namespace Resplot { 

 
class StatVal {
 
public:
 
  double value;
  double error;
 
  StatVal()                    : value(0), error(0) { }  
  StatVal(double v) : value(v) { error=( v>=0 ? sqrt(v) : sqrt(-v) ); }
  StatVal(double v, double e)  : value(v), error(e) { }
 
 
  // operator for StatVal*=double 
  StatVal  operator*=(const double& d)      { value*=d; error*=d; return (*this); }
  // operator for StatVal*double (for double*StatVal see later)
  StatVal  operator*(const double& d) const { return StatVal(d*value, d*error); }
  // StatVal/double 
  StatVal  operator/(const double& d) const { return StatVal(value/d, error/d); }
 
  // can't be bothered with the rest...
 
};
 
 
// operator for double*StatVal
inline StatVal operator*(double d, const StatVal& sv) { return sv*d; }
 
// streamer;
inline std::ostream& operator<<(std::ostream& s, const StatVal& sv) { 
  return s << sv.value << "+-" << sv.error; 
}
 
 
}
 
#endif  /* RESPLOT_STATVAL_H */