QtiPlot 0.9.8.2
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00001 /*************************************************************************** 00002 File : FFT.h 00003 Project : QtiPlot 00004 -------------------------------------------------------------------- 00005 Copyright : (C) 2007 - 2010 by Ion Vasilief 00006 Email (use @ for *) : ion_vasilief*yahoo.fr 00007 Description : Numerical FFT 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 FFT_H 00030 #define FFT_H 00031 00032 #include "Filter.h" 00033 00034 class FFT : public Filter 00035 { 00036 Q_OBJECT 00037 00038 public: 00039 FFT(ApplicationWindow *parent, Table *t, const QString& realColName, const QString& imagColName = QString(), int from = 1, int to = -1); 00040 FFT(ApplicationWindow *parent, QwtPlotCurve *c); 00041 FFT(ApplicationWindow *parent, QwtPlotCurve *c, double start, double end); 00042 FFT(ApplicationWindow *parent, Graph *g, const QString& curveTitle); 00043 FFT(ApplicationWindow *parent, Graph *g, const QString& curveTitle, double start, double end); 00044 FFT(ApplicationWindow *parent, Matrix *re, Matrix *im = NULL, bool inverse = false, bool shift = true, bool norm = false, bool outputPower2Sizes = true); 00045 00046 void setInverseFFT(bool inverse = true){d_inverse = inverse;}; 00047 void setSampling(double sampling){d_sampling = sampling;}; 00048 void normalizeAmplitudes(bool norm = true){d_normalize = norm;}; 00049 void shiftFrequencies(bool shift = true){d_shift_order = shift;}; 00050 00051 Matrix *amplitudesMatrix(){return d_amp_matrix;} 00052 Matrix *realOutputMatrix(){return d_re_out_matrix;} 00053 Matrix *imaginaryOutputMatrix(){return d_im_out_matrix;} 00054 00055 private: 00056 void init(); 00057 void output(); 00058 void outputGraphs(); 00059 void fftCurve(); 00060 void fftTable(); 00061 void fftMatrix(); 00062 00063 bool setDataFromTable(Table *t, const QString& realColName, const QString& imagColName = QString(), int from = 0, int to = -1); 00064 00065 double d_sampling; 00067 bool d_inverse; 00069 bool d_normalize; 00071 bool d_shift_order; 00072 00073 int d_real_col, d_imag_col; 00074 00075 Matrix *d_im_matrix; 00076 Matrix *d_re_out_matrix; 00077 Matrix *d_im_out_matrix; 00078 Matrix *d_amp_matrix; 00079 bool d_power2; 00080 }; 00081 00082 #endif