Category : OS/2 Files
Archive   : GPPDEV8F.ZIP
Filename : WEIBULL.H

// This may look like C code, but it is really -*- C++ -*-
/*
Copyright (C) 1988 Free Software Foundation
written by Dirk Grunwald ([email protected])

This file is part of the GNU C++ Library. This library is free
software; you can redistribute it and/or modify it under the terms of
the GNU Library General Public License as published by the Free
Software Foundation; either version 2 of the License, or (at your
option) any later version. This library is distributed in the hope
that it will be useful, but WITHOUT ANY WARRANTY; without even the
implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the GNU Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free Software
Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef _Weibull_h
#ifdef __GNUG__
#pragma interface
#endif
#define _Weibull_h

#include

class Weibull: public Random {
protected:
double pAlpha;
double pInvAlpha;
double pBeta;

void setState();

public:
Weibull(double alpha, double beta, RNG *gen);

double alpha();
double alpha(double x);

double beta();
double beta(double x);

virtual double operator()();
};


inline void Weibull::setState() {
pInvAlpha = 1.0 / pAlpha;
}

inline Weibull::Weibull(double alpha, double beta, RNG *gen) : Random(gen)
{
pAlpha = alpha;
pBeta = beta;
setState();
}

inline double Weibull::alpha() { return pAlpha; }

inline double Weibull::alpha(double x) {
double tmp = pAlpha;
pAlpha = x;
setState();
return tmp;
}

inline double Weibull::beta() { return pBeta; };
inline double Weibull::beta(double x) {
double tmp = pBeta;
pBeta = x;
return tmp;
};

#endif