ExponentialFit.h

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00001 /***************************************************************************
00002     File                 : fitclasses.h
00003     Project              : QtiPlot
00004     --------------------------------------------------------------------
00005     Copyright            : (C) 2006 by Ion Vasilief, Tilman Hoener zu Siederdissen
00006     Email (use @ for *)  : ion_vasilief*yahoo.fr, thzs*gmx.net
00007     Description          : Exponential fit classes
00008 
00009  ***************************************************************************/
00010 
00011 /***************************************************************************
00012  *                                                                         *
00013  *  This program is free software; you can redistribute it and/or modify   *
00014  *  it under the terms of the GNU General Public License as published by   *
00015  *  the Free Software Foundation; either version 2 of the License, or      *
00016  *  (at your option) any later version.                                    *
00017  *                                                                         *
00018  *  This program is distributed in the hope that it will be useful,        *
00019  *  but WITHOUT ANY WARRANTY; without even the implied warranty of         *
00020  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the          *
00021  *  GNU General Public License for more details.                           *
00022  *                                                                         *
00023  *   You should have received a copy of the GNU General Public License     *
00024  *   along with this program; if not, write to the Free Software           *
00025  *   Foundation, Inc., 51 Franklin Street, Fifth Floor,                    *
00026  *   Boston, MA  02110-1301  USA                                           *
00027  *                                                                         *
00028  ***************************************************************************/
00029 #ifndef EXPONENTIALFIT_H
00030 #define EXPONENTIALFIT_H
00031 
00032 #include "Fit.h"
00033 
00034 class ExponentialFit : public Fit
00035 {
00036     Q_OBJECT
00037 
00038     public:
00039         ExponentialFit(ApplicationWindow *parent, Graph *g,  bool expGrowth = false);
00040         ExponentialFit(ApplicationWindow *parent, Graph *g, const QString& curveTitle, bool expGrowth = false);
00041         ExponentialFit(ApplicationWindow *parent, Graph *g, const QString& curveTitle,
00042                 double start, double end, bool expGrowth = false);
00043         ExponentialFit(ApplicationWindow *parent, Table *t, const QString& xCol, const QString& yCol, int startRow = 1, int endRow = -1, bool expGrowth = false);
00044 
00045         double eval(double *par, double x){return par[0]*exp(-par[1]*x) + par[2];};
00046         bool isExponentialGrowth(){return is_exp_growth;};
00047 
00048     private:
00049         void init();
00050         void customizeFitResults();
00051         void calculateFitCurveData(double *X, double *Y);
00052 
00053         bool is_exp_growth;
00054 };
00055 
00056 class TwoExpFit : public Fit
00057 {
00058     Q_OBJECT
00059 
00060     public:
00061         TwoExpFit(ApplicationWindow *parent, Graph *g);
00062         TwoExpFit(ApplicationWindow *parent, Graph *g, const QString& curveTitle);
00063         TwoExpFit(ApplicationWindow *parent, Graph *g, const QString& curveTitle, double start, double end);
00064         TwoExpFit(ApplicationWindow *parent, Table *t, const QString& xCol, const QString& yCol, int startRow = 1, int endRow = -1);
00065 
00066         double eval(double *par, double x){return par[0]*exp(-par[1]*x)+par[2]*exp(-par[3]*x)+par[4];};
00067 
00068     private:
00069         void init();
00070         void customizeFitResults();
00071         void calculateFitCurveData(double *X, double *Y);
00072 };
00073 
00074 class ThreeExpFit : public Fit
00075 {
00076     Q_OBJECT
00077 
00078     public:
00079         ThreeExpFit(ApplicationWindow *parent, Graph *g);
00080         ThreeExpFit(ApplicationWindow *parent, Graph *g, const QString& curveTitle);
00081         ThreeExpFit(ApplicationWindow *parent, Graph *g, const QString& curveTitle, double start, double end);
00082         ThreeExpFit(ApplicationWindow *parent, Table *t, const QString& xCol, const QString& yCol, int startRow = 1, int endRow = -1);
00083 
00084         double eval(double *par, double x){return par[0]*exp(-x*par[1])+par[2]*exp(-x*par[3])+par[4]*exp(-x*par[5])+par[6];};
00085 
00086     private:
00087         void init();
00088         void customizeFitResults();
00089         void calculateFitCurveData(double *X, double *Y);
00090 };
00091 #endif

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