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GSLInterpolator.cxx
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1// @(#)root/mathmore:$Id$
2// Authors: L. Moneta, A. Zsenei 08/2005
3
4 /**********************************************************************
5 * *
6 * Copyright (c) 2004 ROOT Foundation, CERN/PH-SFT *
7 * *
8 * This library is free software; you can redistribute it and/or *
9 * modify it under the terms of the GNU General Public License *
10 * as published by the Free Software Foundation; either version 2 *
11 * of the License, or (at your option) any later version. *
12 * *
13 * This library is distributed in the hope that it will be useful, *
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
16 * General Public License for more details. *
17 * *
18 * You should have received a copy of the GNU General Public License *
19 * along with this library (see file COPYING); if not, write *
20 * to the Free Software Foundation, Inc., 59 Temple Place, Suite *
21 * 330, Boston, MA 02111-1307 USA, or contact the author. *
22 * *
23 **********************************************************************/
24
25// Implementation file for class GSLInterpolator
26//
27// Created by: moneta at Sun Nov 28 08:54:48 2004
28//
29// Last update: Sun Nov 28 08:54:48 2004
30//
31
32#include "GSLInterpolator.h"
33
34
35#include <cassert>
36
37namespace ROOT {
38namespace Math {
39
40
42 fResetNErrors(true),
43 fAccel(0),
44 fSpline(0)
45{
46 // constructor given type and vectors of (x,y) points
47
48 switch ( type )
49 {
51 fInterpType = gsl_interp_linear;
52 break ;
54 fInterpType = gsl_interp_polynomial;
55 break ;
56 // depened on GSL linear algebra
58 fInterpType = gsl_interp_cspline ;
59 break ;
61 fInterpType = gsl_interp_cspline_periodic ;
62 break ;
64 fInterpType = gsl_interp_akima;
65 break ;
67 fInterpType = gsl_interp_akima_periodic;
68 break ;
69 default :
70 // cspline
71 fInterpType = gsl_interp_cspline;
72 break ;
73 }
74 // allocate objects
75
76 if (size >= fInterpType->min_size)
77 fSpline = gsl_spline_alloc( fInterpType, size);
78
79}
80
81bool GSLInterpolator::Init(unsigned int size, const double *x, const double * y) {
82 // initialize interpolation object with the given data
83 // if given size is different a new interpolator object is created
84 if (fSpline == 0)
85 fSpline = gsl_spline_alloc( fInterpType, size);
86
87 else {
88 gsl_interp * interp = fSpline->interp;
89 if (size != interp->size) {
90 // free and reallocate a new object
91 gsl_spline_free(fSpline);
92 fSpline = gsl_spline_alloc( fInterpType, size);
93
94 }
95 }
96 if (!fSpline) return false;
97
98 int iret = gsl_spline_init( fSpline , x , y , size );
99 if (iret != 0) return false;
100
101 if(fAccel==0)
102 fAccel = gsl_interp_accel_alloc() ;
103 else
104 gsl_interp_accel_reset(fAccel);
105
106 // if (fSpline == 0 || fAccel == 0)
107 // throw std::exception();
108 assert (fSpline != 0);
109 assert (fAccel != 0);
110 // reset counter for error messages
111 fResetNErrors = true;
112 return true;
113}
114
116{
117 // free gsl objects
118 if (fSpline != 0) gsl_spline_free(fSpline);
119 if (fAccel != 0) gsl_interp_accel_free( fAccel);
120}
121
123{
124 // dummy copy ctr
125}
126
128{
129 // dummy assignment operator
130 if (this == &rhs) return *this; // time saving self-test
131
132 return *this;
133}
134
135
136} // namespace Math
137} // namespace ROOT
size_t size(const MatrixT &matrix)
retrieve the size of a square matrix
Option_t Option_t TPoint TPoint const char GetTextMagnitude GetFillStyle GetLineColor GetLineWidth GetMarkerStyle GetTextAlign GetTextColor GetTextSize void char Point_t Rectangle_t WindowAttributes_t Float_t Float_t Float_t Int_t Int_t UInt_t UInt_t Rectangle_t Int_t Int_t Window_t TString Int_t GCValues_t GetPrimarySelectionOwner GetDisplay GetScreen GetColormap GetNativeEvent const char const char dpyName wid window const char font_name cursor keysym reg const char only_if_exist regb h Point_t winding char text const char depth char const char Int_t count const char ColorStruct_t color const char Pixmap_t Pixmap_t PictureAttributes_t attr const char char ret_data h unsigned char height h Atom_t Int_t ULong_t ULong_t unsigned char prop_list Atom_t Atom_t Atom_t Time_t type
Interpolation class based on GSL interpolation functions.
GSLInterpolator(unsigned int ndata, Interpolation::Type type)
GSLInterpolator & operator=(const GSLInterpolator &)
bool Init(unsigned int ndata, const double *x, const double *y)
const gsl_interp_type * fInterpType
Type
Enumeration defining the types of interpolation methods availables.
Double_t y[n]
Definition: legend1.C:17
Double_t x[n]
Definition: legend1.C:17
Namespace for new Math classes and functions.
This file contains a specialised ROOT message handler to test for diagnostic in unit tests.