SciDAVis  1.D4
SmoothFilter.h
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1 /***************************************************************************
2  File : SmoothFilter.h
3  Project : SciDAVis
4  --------------------------------------------------------------------
5  Copyright : (C) 2007 by Ion Vasilief
6  Email (use @ for *) : ion_vasilief*yahoo.fr
7  Description : Numerical smoothing of data sets
8 
9  ***************************************************************************/
10 
11 /***************************************************************************
12  * *
13  * This program is free software; you can redistribute it and/or modify *
14  * it under the terms of the GNU General Public License as published by *
15  * the Free Software Foundation; either version 2 of the License, or *
16  * (at your option) any later version. *
17  * *
18  * This program is distributed in the hope that it will be useful, *
19  * but WITHOUT ANY WARRANTY; without even the implied warranty of *
20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
21  * GNU General Public License for more details. *
22  * *
23  * You should have received a copy of the GNU General Public License *
24  * along with this program; if not, write to the Free Software *
25  * Foundation, Inc., 51 Franklin Street, Fifth Floor, *
26  * Boston, MA 02110-1301 USA *
27  * *
28  ***************************************************************************/
29 #ifndef SMOOTHFILTER_H
30 #define SMOOTHFILTER_H
31 
32 #include "Filter.h"
33 #include <gsl/gsl_matrix_double.h>
34 
35 class SmoothFilter : public Filter
36 {
37 Q_OBJECT
38 
39 public:
40  SmoothFilter(ApplicationWindow *parent, Graph *g, const QString& curveTitle, int m = 3);
41  SmoothFilter(ApplicationWindow *parent, Graph *g, const QString& curveTitle, double start, double end, int m = 3);
42 
43  enum SmoothMethod{SavitzkyGolay = 1, FFT = 2, Average = 3};
44 
45  int method(){return (int)d_method;};
46  void setMethod(int m);
47  void setMethod(SmoothMethod m){setMethod((int)m);};
48 
49  void setSmoothPoints(int points, int left_points = 0);
51  void setPolynomOrder(int order);
52 
53 private:
54  void init(int m);
55  void calculateOutputData(double *x, double *y);
56  void smoothFFT(double *x, double *y);
57  void smoothAverage(double *x, double *y);
58  void smoothSavGol(double *x, double *y);
59  void smoothModifiedSavGol(double *x, double *y);
60  static int savitzkyGolayCoefficients(int points, int polynom_order, gsl_matrix *h);
61 
63  SmoothMethod d_method;
64 
66  int d_right_points;
67 
69  int d_left_points;
70 
72  int d_polynom_order;
73 };
74 
75 #endif
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