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1 // f-minmax.cc -*- C++ -*- |
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2 /* |
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3 |
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4 Copyright (C) 1994 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 #ifdef HAVE_CONFIG_H |
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25 #include "config.h" |
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26 #endif |
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27 |
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28 #include <math.h> |
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29 |
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30 #include "tree-const.h" |
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31 #include "error.h" |
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32 #include "help.h" |
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519
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33 #include "defun-dld.h" |
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34 |
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35 #ifndef MAX |
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36 #define MAX(a,b) ((a) > (b) ? (a) : (b)) |
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37 #endif |
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38 |
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39 #ifndef MIN |
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40 #define MIN(a,b) ((a) < (b) ? (a) : (b)) |
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41 #endif |
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42 |
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43 static Matrix |
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44 min (const Matrix& a, const Matrix& b) |
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45 { |
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46 int nr = a.rows (); |
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47 int nc = a.columns (); |
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48 if (nr != b.rows () || nc != b.columns ()) |
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49 { |
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50 error ("two-arg min expecting args of same size"); |
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51 return Matrix (); |
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52 } |
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53 |
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54 Matrix result (nr, nc); |
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55 |
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56 for (int j = 0; j < nc; j++) |
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57 for (int i = 0; i < nr; i++) |
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58 { |
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59 double a_elem = a.elem (i, j); |
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60 double b_elem = b.elem (i, j); |
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61 result.elem (i, j) = MIN (a_elem, b_elem); |
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62 } |
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63 |
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64 return result; |
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65 } |
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66 |
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67 static ComplexMatrix |
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68 min (const ComplexMatrix& a, const ComplexMatrix& b) |
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69 { |
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70 int nr = a.rows (); |
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71 int nc = a.columns (); |
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72 if (nr != b.rows () || nc != b.columns ()) |
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73 { |
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74 error ("two-arg min expecting args of same size"); |
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75 return ComplexMatrix (); |
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76 } |
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77 |
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78 ComplexMatrix result (nr, nc); |
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79 |
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80 for (int j = 0; j < nc; j++) |
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81 for (int i = 0; i < nr; i++) |
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82 { |
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83 double abs_a_elem = abs (a.elem (i, j)); |
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84 double abs_b_elem = abs (b.elem (i, j)); |
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85 if (abs_a_elem < abs_b_elem) |
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86 result.elem (i, j) = a.elem (i, j); |
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87 else |
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88 result.elem (i, j) = b.elem (i, j); |
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89 } |
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90 |
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91 return result; |
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92 } |
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93 |
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94 static Matrix |
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95 max (const Matrix& a, const Matrix& b) |
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96 { |
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97 int nr = a.rows (); |
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98 int nc = a.columns (); |
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99 if (nr != b.rows () || nc != b.columns ()) |
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100 { |
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101 error ("two-arg max expecting args of same size"); |
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102 return Matrix (); |
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103 } |
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104 |
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105 Matrix result (nr, nc); |
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106 |
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107 for (int j = 0; j < nc; j++) |
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108 for (int i = 0; i < nr; i++) |
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109 { |
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110 double a_elem = a.elem (i, j); |
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111 double b_elem = b.elem (i, j); |
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112 result.elem (i, j) = MAX (a_elem, b_elem); |
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113 } |
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114 |
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115 return result; |
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116 } |
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117 |
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118 static ComplexMatrix |
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119 max (const ComplexMatrix& a, const ComplexMatrix& b) |
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120 { |
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121 int nr = a.rows (); |
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122 int nc = a.columns (); |
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123 if (nr != b.rows () || nc != b.columns ()) |
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124 { |
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125 error ("two-arg max expecting args of same size"); |
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126 return ComplexMatrix (); |
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127 } |
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128 |
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129 ComplexMatrix result (nr, nc); |
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130 |
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131 for (int j = 0; j < nc; j++) |
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132 for (int i = 0; i < nr; i++) |
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133 { |
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134 double abs_a_elem = abs (a.elem (i, j)); |
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135 double abs_b_elem = abs (b.elem (i, j)); |
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136 if (abs_a_elem > abs_b_elem) |
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137 result.elem (i, j) = a.elem (i, j); |
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138 else |
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139 result.elem (i, j) = b.elem (i, j); |
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140 } |
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141 |
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142 return result; |
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143 } |
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144 |
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519
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145 |
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146 DEFUN_DLD ("min", Fmin, Smin, 3, 2, |
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147 "min (X): minimum value(s) of a vector (matrix)") |
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515
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148 { |
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149 Octave_object retval; |
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150 |
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519
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151 int nargin = args.length (); |
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152 |
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153 if (nargin == 1 || nargin > 3 || nargout > 2) |
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154 { |
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155 print_usage ("min"); |
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156 return retval; |
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157 } |
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158 |
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515
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159 tree_constant arg1; |
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160 tree_constant arg2; |
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161 |
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162 switch (nargin) |
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163 { |
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164 case 3: |
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636
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165 arg2 = args(2); |
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515
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166 // Fall through... |
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167 case 2: |
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636
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168 arg1 = args(1); |
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169 break; |
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170 default: |
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171 panic_impossible (); |
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172 break; |
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173 } |
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174 |
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175 if (nargin == 2 && (nargout == 1 || nargout == 0)) |
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176 { |
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620
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177 if (arg1.is_real_scalar ()) |
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178 { |
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179 retval(0) = arg1.double_value (); |
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620
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180 } |
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181 else if (arg1.is_complex_scalar ()) |
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182 { |
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183 retval(0) = arg1.complex_value (); |
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620
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184 } |
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636
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185 else if (arg1.is_real_type ()) |
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620
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186 { |
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187 Matrix m = arg1.matrix_value (); |
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188 |
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189 if (! error_state) |
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190 { |
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191 if (m.rows () == 1) |
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192 retval(0) = m.row_min (); |
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193 else |
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194 retval(0) = tree_constant (m.column_min (), 0); |
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195 } |
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620
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196 } |
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636
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197 else if (arg1.is_complex_type ()) |
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620
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198 { |
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199 ComplexMatrix m = arg1.complex_matrix_value (); |
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636
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200 |
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201 if (! error_state) |
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202 { |
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203 if (m.rows () == 1) |
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204 retval(0) = m.row_min (); |
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205 else |
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206 retval(0) = tree_constant (m.column_min (), 0); |
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207 } |
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620
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208 } |
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209 else |
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210 { |
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211 gripe_wrong_type_arg ("min", arg1); |
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212 return retval; |
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515
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213 } |
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214 } |
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215 else if (nargin == 2 && nargout == 2) |
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216 { |
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620
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217 if (arg1.is_real_scalar ()) |
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218 { |
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620
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219 retval(1) = 1; |
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220 retval(0) = arg1.double_value (); |
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221 } |
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222 else if (arg1.is_complex_scalar ()) |
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223 { |
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224 retval(1) = 1; |
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225 retval(0) = arg1.complex_value (); |
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226 } |
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636
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227 else if (arg1.is_real_type ()) |
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620
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228 { |
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229 Matrix m = arg1.matrix_value (); |
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230 |
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231 if (! error_state) |
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620
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232 { |
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636
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233 if (m.rows () == 1) |
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234 { |
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235 retval(1) = m.row_min_loc (); |
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236 retval(0) = m.row_min (); |
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237 } |
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238 else |
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239 { |
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240 retval(1) = tree_constant (m.column_min_loc (), 0); |
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241 retval(0) = tree_constant (m.column_min (), 0); |
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242 } |
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620
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243 } |
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244 } |
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636
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245 else if (arg1.is_complex_type ()) |
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620
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246 { |
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247 ComplexMatrix m = arg1.complex_matrix_value (); |
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636
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248 |
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249 if (! error_state) |
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620
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250 { |
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636
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251 if (m.rows () == 1) |
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252 { |
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253 retval(1) = m.row_min_loc (); |
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254 retval(0) = m.row_min (); |
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255 } |
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256 else |
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257 { |
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258 retval(1) = tree_constant (m.column_min_loc (), 0); |
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259 retval(0) = tree_constant (m.column_min (), 0); |
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260 } |
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620
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261 } |
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262 } |
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263 else |
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264 { |
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265 gripe_wrong_type_arg ("min", arg1); |
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266 return retval; |
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515
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267 } |
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268 } |
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269 else if (nargin == 3) |
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270 { |
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271 if (arg1.rows () == arg2.rows () |
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272 && arg1.columns () == arg2.columns ()) |
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273 { |
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636
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274 if (arg1.is_real_type () && arg2.is_real_type ()) |
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620
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275 { |
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636
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276 Matrix m1 = arg1.matrix_value (); |
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277 |
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278 if (! error_state) |
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279 { |
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280 Matrix m2 = arg2.matrix_value (); |
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281 |
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282 if (! error_state) |
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283 { |
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284 Matrix result = min (m1, m2); |
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285 if (! error_state) |
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286 retval(0) = result; |
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287 } |
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288 } |
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620
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289 } |
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636
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290 else if (arg1.is_complex_matrix () || arg2.is_complex_type ()) |
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620
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291 { |
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636
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292 ComplexMatrix m1 = arg1.complex_matrix_value (); |
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293 |
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294 if (! error_state) |
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295 { |
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296 ComplexMatrix m2 = arg2.complex_matrix_value (); |
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297 |
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298 if (! error_state) |
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299 { |
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300 ComplexMatrix result = min (m1, m2); |
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301 if (! error_state) |
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302 retval(0) = result; |
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303 } |
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304 } |
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620
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305 } |
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306 else |
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307 { |
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308 gripe_wrong_type_arg ("min", arg1); |
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309 return retval; |
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515
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310 } |
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311 } |
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312 else |
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313 error ("min: nonconformant matrices"); |
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314 } |
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315 else |
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316 panic_impossible (); |
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317 |
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318 return retval; |
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319 } |
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320 |
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519
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321 DEFUN_DLD ("max", Fmax, Smax, 3, 2, |
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322 "max (X): maximum value(s) of a vector (matrix)") |
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515
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323 { |
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324 Octave_object retval; |
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325 |
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519
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326 int nargin = args.length (); |
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327 |
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328 if (nargin == 1 || nargin > 3 || nargout > 2) |
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329 { |
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330 print_usage ("max"); |
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331 return retval; |
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332 } |
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333 |
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515
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334 tree_constant arg1; |
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335 tree_constant arg2; |
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336 |
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337 switch (nargin) |
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338 { |
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339 case 3: |
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636
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340 arg2 = args(2); |
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515
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341 // Fall through... |
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342 case 2: |
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636
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343 arg1 = args(1); |
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515
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344 break; |
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345 default: |
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346 panic_impossible (); |
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347 break; |
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348 } |
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349 |
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350 if (nargin == 2 && (nargout == 1 || nargout == 0)) |
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351 { |
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620
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352 if (arg1.is_real_scalar ()) |
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515
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353 { |
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354 retval(0) = arg1.double_value (); |
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620
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355 } |
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356 else if (arg1.is_complex_scalar ()) |
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357 { |
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515
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358 retval(0) = arg1.complex_value (); |
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620
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359 } |
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360 else if (arg1.is_real_matrix ()) |
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361 { |
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362 Matrix m = arg1.matrix_value (); |
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363 if (m.rows () == 1) |
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364 retval(0) = m.row_max (); |
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365 else |
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366 retval(0) = tree_constant (m.column_max (), 0); |
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367 } |
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368 else if (arg1.is_complex_matrix ()) |
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369 { |
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370 ComplexMatrix m = arg1.complex_matrix_value (); |
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371 if (m.rows () == 1) |
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372 retval(0) = m.row_max (); |
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373 else |
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374 retval(0) = tree_constant (m.column_max (), 0); |
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375 } |
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376 else |
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377 { |
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378 gripe_wrong_type_arg ("max", arg1); |
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379 return retval; |
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515
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380 } |
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381 } |
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382 else if (nargin == 2 && nargout == 2) |
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383 { |
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620
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384 if (arg1.is_real_scalar ()) |
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385 { |
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386 retval(1) = 1; |
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387 retval(0) = arg1.double_value (); |
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388 } |
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389 else if (arg1.is_complex_scalar ()) |
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390 { |
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391 retval(1) = 1; |
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392 retval(0) = arg1.complex_value (); |
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393 } |
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394 else if (arg1.is_real_matrix ()) |
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395 { |
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396 Matrix m = arg1.matrix_value (); |
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397 if (m.rows () == 1) |
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398 { |
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399 retval(1) = m.row_max_loc (); |
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400 retval(0) = m.row_max (); |
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401 } |
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402 else |
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403 { |
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404 retval(1) = tree_constant (m.column_max_loc (), 0); |
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405 retval(0) = tree_constant (m.column_max (), 0); |
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406 } |
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407 } |
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408 else if (arg1.is_complex_matrix ()) |
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409 { |
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410 ComplexMatrix m = arg1.complex_matrix_value (); |
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411 if (m.rows () == 1) |
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412 { |
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413 retval(1) = m.row_max_loc (); |
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414 retval(0) = m.row_max (); |
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415 } |
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416 else |
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417 { |
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418 retval(1) = tree_constant (m.column_max_loc (), 0); |
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419 retval(0) = tree_constant (m.column_max (), 0); |
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420 } |
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421 } |
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422 else |
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423 { |
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424 gripe_wrong_type_arg ("max", arg1); |
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425 return retval; |
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426 } |
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515
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427 } |
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428 else if (nargin == 3) |
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429 { |
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430 if (arg1.rows () == arg2.rows () |
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431 && arg1.columns () == arg2.columns ()) |
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432 { |
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620
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433 // XXX FIXME XXX -- I don't think this is quite right. |
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434 if (arg1.is_real_scalar ()) |
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515
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435 { |
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620
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436 double result; |
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437 double a_elem = arg1.double_value (); |
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438 double b_elem = arg2.double_value (); |
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439 result = MAX (a_elem, b_elem); |
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440 retval(0) = result; |
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441 } |
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442 else if (arg1.is_complex_scalar ()) |
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443 { |
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444 Complex result; |
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445 Complex a_elem = arg1.complex_value (); |
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446 Complex b_elem = arg2.complex_value (); |
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447 if (abs (a_elem) > abs (b_elem)) |
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448 result = a_elem; |
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449 else |
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450 result = b_elem; |
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451 retval(0) = result; |
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452 } |
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453 else if (arg1.is_real_matrix ()) |
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454 { |
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455 Matrix result; |
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456 result = max (arg1.matrix_value (), arg2.matrix_value ()); |
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457 retval(0) = result; |
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458 } |
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459 else if (arg1.is_complex_matrix ()) |
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460 { |
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461 ComplexMatrix result; |
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462 result = max (arg1.complex_matrix_value (), |
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463 arg2.complex_matrix_value ()); |
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464 retval(0) = result; |
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465 } |
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466 else |
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467 { |
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468 gripe_wrong_type_arg ("max", arg1); |
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469 return retval; |
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515
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470 } |
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471 } |
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472 else |
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473 error ("max: nonconformant matrices"); |
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474 } |
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475 else |
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476 panic_impossible (); |
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477 |
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478 return retval; |
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479 } |
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480 |
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481 /* |
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482 ;;; Local Variables: *** |
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483 ;;; mode: C++ *** |
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484 ;;; page-delimiter: "^/\\*" *** |
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485 ;;; End: *** |
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486 */ |
