00001 /*************************************************************************** 00002 File : FFT.h 00003 Project : QtiPlot 00004 -------------------------------------------------------------------- 00005 Copyright : (C) 2007 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()); 00040 FFT(ApplicationWindow *parent, Graph *g, const QString& curveTitle); 00041 00042 void setInverseFFT(bool inverse = true){d_inverse = inverse;}; 00043 void setSampling(double sampling){d_sampling = sampling;}; 00044 void normalizeAmplitudes(bool norm = true){d_normalize = norm;}; 00045 void shiftFrequencies(bool shift = true){d_shift_order = shift;}; 00046 00047 private: 00048 void init(); 00049 void output(); 00050 void output(const QString &text); 00051 00052 QString fftCurve(); 00053 QString fftTable(); 00054 00055 void setDataFromTable(Table *t, const QString& realColName, const QString& imagColName = QString()); 00056 00057 double d_sampling; 00059 bool d_inverse; 00061 bool d_normalize; 00063 bool d_shift_order; 00064 00065 int d_real_col, d_imag_col; 00066 }; 00067 00068 #endif