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1 // Quad.h -*- C++ -*- |
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2 /* |
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3 |
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4 Copyright (C) 1992, 1993 John W. Eaton |
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5 |
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6 This file is part of Octave. |
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7 |
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8 Octave is free software; you can redistribute it and/or modify it |
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9 under the terms of the GNU General Public License as published by the |
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10 Free Software Foundation; either version 2, or (at your option) any |
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11 later version. |
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12 |
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13 Octave is distributed in the hope that it will be useful, but WITHOUT |
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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16 for more details. |
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17 |
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18 You should have received a copy of the GNU General Public License |
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19 along with Octave; see the file COPYING. If not, write to the Free |
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20 Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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21 |
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22 */ |
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23 |
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24 #if !defined (_Quad_h) |
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25 #define _Quad_h 1 |
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26 |
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27 #include "Matrix.h" |
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28 |
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29 #ifndef Vector |
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30 #define Vector ColumnVector |
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31 #endif |
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32 |
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33 #ifndef _Quad_typedefs |
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34 #define _Quad_typedefs 1 |
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35 |
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36 typedef double (*integrand_fcn) (double x); |
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37 |
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38 #endif |
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39 |
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40 class Quad |
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41 { |
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42 public: |
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43 |
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44 Quad (integrand_fcn fcn); |
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45 Quad (integrand_fcn fcn, double abs, double rel); |
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46 |
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47 virtual double integrate (void); |
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48 virtual double integrate (int& ier); |
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49 virtual double integrate (int& ier, int& neval); |
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50 virtual double integrate (int& ier, int& neval, double& abserr) = 0; |
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51 |
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52 protected: |
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53 |
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54 double absolute_tolerance; |
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55 double relative_tolerance; |
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56 |
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57 integrand_fcn f; |
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58 }; |
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59 |
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60 class DefQuad : public Quad |
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61 { |
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62 public: |
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63 |
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64 DefQuad (integrand_fcn fcn); |
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65 DefQuad (integrand_fcn fcn, double ll, double ul); |
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66 DefQuad (integrand_fcn fcn, double ll, double ul, double abs, double rel); |
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67 DefQuad (integrand_fcn fcn, double ll, double ul, const Vector& sing); |
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68 DefQuad (integrand_fcn fcn, const Vector& sing, double abs, double rel); |
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69 DefQuad (integrand_fcn fcn, const Vector& sing); |
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70 DefQuad (integrand_fcn fcn, double ll, double ul, const Vector& sing, |
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71 double abs, double rel); |
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72 |
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73 double integrate (int& ier, int& neval, double& abserr); |
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74 |
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75 private: |
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76 |
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77 double lower_limit; |
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78 double upper_limit; |
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79 |
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80 Vector singularities; |
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81 }; |
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82 |
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83 class IndefQuad : public Quad |
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84 { |
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85 public: |
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86 |
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87 enum IntegralType { bound_to_inf, neg_inf_to_bound, doubly_infinite }; |
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88 |
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89 IndefQuad (integrand_fcn fcn); |
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90 IndefQuad (integrand_fcn fcn, double b, IntegralType t); |
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91 IndefQuad (integrand_fcn fcn, double b, IntegralType t, double abs, |
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92 double rel); |
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93 IndefQuad (integrand_fcn fcn, double abs, double rel); |
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94 |
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95 double integrate (int& ier, int& neval, double& abserr); |
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96 |
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97 private: |
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98 |
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99 double bound; |
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100 IntegralType type; |
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101 }; |
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102 |
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103 #endif |
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104 |
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105 /* |
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106 ;;; Local Variables: *** |
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107 ;;; mode: C++ *** |
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108 ;;; page-delimiter: "^/\\*" *** |
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109 ;;; End: *** |
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110 */ |
