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// -*- C++ -*-
//
// Measurement.h is a part of ThePEG - Toolkit for HEP Event Generation
// Copyright (C) 1999-2007 Leif Lonnblad
//
// ThePEG is licenced under version 2 of the GPL, see COPYING for details.
// Please respect the MCnet academic guidelines, see GUIDELINES for details.
//
#ifndef LWH_Measurement_H
#define LWH_Measurement_H
//
// This is the declaration of the Measurement class representing
//
#include <limits>
#include <cmath>
#include <algorithm>
#include "AIMeasurement.h"
namespace LWH {
using namespace AIDA;
/**
* Basic user-level interface class for holding a single "measurement"
* with positive and negative errors (to allow for asymmetric errors).
* "IMeasurement" = "value" + "errorPlus" - "errorMinus"
*/
class Measurement: public IMeasurement {
public:
/**
* Standard constructor.
*/
Measurement(double v = 0.0, double ep = 0.0, double em = 0.0)
: val(v), errp(ep), errm(em) {}
/**
* Copy constructor.
*/
Measurement(const Measurement & m)
:IMeasurement(m), val(m.val), errp(m.errp), errm(m.errm) {}
/**
* Destructor.
*/
virtual ~Measurement() { /* nop */; }
/**
* Get the value of the Measurement.
* @return The value of the Measurement.
*/
double value() const {
return val;
}
/**
* Get the plus error of the IMeasurement.
* @return The plus error.
*/
double errorPlus() const {
return errp;
}
/**
* Get the minus error of the IMeasurement.
* @return The minus error.
*/
double errorMinus() const {
return errm;
}
/**
* Set the value of the IMeasurement.
* @param v The new value of the IMeasurement.
* @return false If the value cannot be set.
*/
bool setValue(double v) {
val = v;
return true;
}
/**
* Set the plus error of the IMeasurement.
* @param ep The new plus error of the IMeasurement.
* @return false If the error cannot be set or it is negative.
*/
bool setErrorPlus(double ep) {
errp = ep;
return ep < 0.0;
}
/**
* Set the minus error of the IMeasurement.
* @param em The new minus error of the IMeasurement.
* @return false If the error cannot be set or it is negative.
*/
bool setErrorMinus(double em) {
errm = em;
return em < 0.0;
}
private:
/**
* The value.
*/
double val;
/**
* The plus error.
*/
double errp;
/**
* The minus error.
*/
double errm;
};
}
#endif /* LWH_Measurement_H */

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