00001 /*************************************************************************** 00002 File : SigmoidalFit.h 00003 Project : QtiPlot 00004 -------------------------------------------------------------------- 00005 Copyright : (C) 2007 by Ion Vasilief 00006 Email (use @ for *) : ion_vasilief*yahoo.fr 00007 Description : Sigmoidal (Boltzmann) Fit class 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 SIGMOIDALFIT_H 00030 #define SIGMOIDALFIT_H 00031 00032 #include "Fit.h" 00033 00034 class SigmoidalFit : public Fit 00035 { 00036 Q_OBJECT 00037 00038 public: 00039 SigmoidalFit(ApplicationWindow *parent, QwtPlotCurve *); 00040 SigmoidalFit(ApplicationWindow *parent, QwtPlotCurve *, double, double); 00041 SigmoidalFit(ApplicationWindow *parent, Graph *g); 00042 SigmoidalFit(ApplicationWindow *parent, Graph *g, const QString& curveTitle); 00043 SigmoidalFit(ApplicationWindow *parent, Graph *g, const QString& curveTitle, double start, double end); 00044 SigmoidalFit(ApplicationWindow *parent, Table *t, const QString& xCol, const QString& yCol, int startRow = 1, int endRow = -1); 00045 00046 double eval(double *par, double x){return (par[0]-par[1])/(1+exp((x-par[2])/par[3]))+par[1];}; 00047 00048 void guessInitialValues(); 00049 void setLogistic(bool on = true); 00050 00051 private: 00052 void init(); 00053 void calculateFitCurveData(double *X, double *Y); 00054 00055 bool d_logistic; 00056 }; 00057 00058 #endif