SmoothFilter.h

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00001 /***************************************************************************
00002     File                 : SmoothFilter.h
00003     Project              : QtiPlot
00004     --------------------------------------------------------------------
00005     Copyright            : (C) 2007 by Ion Vasilief
00006     Email (use @ for *)  : ion_vasilief*yahoo.fr
00007     Description          : Numerical smoothing of data sets
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 SMOOTHFILTER_H
00030 #define SMOOTHFILTER_H
00031 
00032 #include "Filter.h"
00033 
00034 class SmoothFilter : public Filter
00035 {
00036 Q_OBJECT
00037 
00038 public:
00039     SmoothFilter(ApplicationWindow *parent, Graph *g, const QString& curveTitle, int m = 3);
00040     SmoothFilter(ApplicationWindow *parent, Graph *g, const QString& curveTitle, double start, double end, int m = 3);
00041     SmoothFilter(ApplicationWindow *parent, Table *t, const QString& xCol, const QString& yCol, int start = 0, int end = -1, int m = 3);
00042 
00043     enum SmoothMethod{SavitzkyGolay = 1, FFT = 2, Average = 3};
00044 
00045     int method(){return (int)d_method;};
00046     void setMethod(int m);
00047 
00048     void setSmoothPoints(int points, int left_points = 0);
00050     void setPolynomOrder(int order);
00051 
00052 private:
00053     void init(int m);
00054     void calculateOutputData(double *x, double *y);
00055     void smoothFFT(double *x, double *y);
00056     void smoothAverage(double *x, double *y);
00057     void smoothSavGol(double *x, double *y);
00058 
00060     SmoothMethod d_method;
00061 
00063     int d_smooth_points;
00064 
00066     int d_sav_gol_points;
00067 
00069     int d_polynom_order;
00070 };
00071 
00072 #endif

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