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1 // ColumnVector manipulations. -*- C++ -*- |
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2 /* |
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3 |
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4 Copyright (C) 1992, 1993, 1994, 1995 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 (__GNUG__) |
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25 #pragma implementation |
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26 #endif |
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27 |
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28 #ifdef HAVE_CONFIG_H |
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29 #include <config.h> |
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30 #endif |
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31 |
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32 #include <iostream.h> |
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33 |
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34 #include <Complex.h> |
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35 |
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36 #include "mx-base.h" |
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37 #include "mx-inlines.cc" |
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38 #include "f77-uscore.h" |
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39 #include "lo-error.h" |
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40 |
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41 // Fortran functions we call. |
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42 |
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43 extern "C" |
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44 { |
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45 int F77_FCN (dgemv, DGEMV) (const char*, const int&, const int&, |
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46 const double&, const double*, |
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47 const int&, const double*, const int&, |
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48 const double&, double*, const int&, |
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49 long); |
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50 } |
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51 |
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52 /* |
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53 * Column Vector class. |
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54 */ |
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55 |
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56 int |
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57 ColumnVector::operator == (const ColumnVector& a) const |
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58 { |
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59 int len = length (); |
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60 if (len != a.length ()) |
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61 return 0; |
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62 return equal (data (), a.data (), len); |
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63 } |
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64 |
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65 int |
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66 ColumnVector::operator != (const ColumnVector& a) const |
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67 { |
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68 return !(*this == a); |
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69 } |
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70 |
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71 ColumnVector& |
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72 ColumnVector::insert (const ColumnVector& a, int r) |
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73 { |
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74 int a_len = a.length (); |
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75 if (r < 0 || r + a_len - 1 > length ()) |
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76 { |
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77 (*current_liboctave_error_handler) ("range error for insert"); |
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78 return *this; |
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79 } |
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80 |
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81 for (int i = 0; i < a_len; i++) |
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82 elem (r+i) = a.elem (i); |
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83 |
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84 return *this; |
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85 } |
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86 |
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87 ColumnVector& |
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88 ColumnVector::fill (double val) |
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89 { |
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90 int len = length (); |
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91 if (len > 0) |
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92 for (int i = 0; i < len; i++) |
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93 elem (i) = val; |
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94 return *this; |
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95 } |
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96 |
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97 ColumnVector& |
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98 ColumnVector::fill (double val, int r1, int r2) |
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99 { |
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100 int len = length (); |
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101 if (r1 < 0 || r2 < 0 || r1 >= len || r2 >= len) |
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102 { |
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103 (*current_liboctave_error_handler) ("range error for fill"); |
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104 return *this; |
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105 } |
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106 |
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107 if (r1 > r2) { int tmp = r1; r1 = r2; r2 = tmp; } |
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108 |
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109 for (int i = r1; i <= r2; i++) |
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110 elem (i) = val; |
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111 |
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112 return *this; |
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113 } |
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114 |
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115 ColumnVector |
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116 ColumnVector::stack (const ColumnVector& a) const |
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117 { |
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118 int len = length (); |
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119 int nr_insert = len; |
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120 ColumnVector retval (len + a.length ()); |
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121 retval.insert (*this, 0); |
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122 retval.insert (a, nr_insert); |
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123 return retval; |
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124 } |
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125 |
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126 RowVector |
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127 ColumnVector::transpose (void) const |
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128 { |
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129 int len = length (); |
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130 return RowVector (dup (data (), len), len); |
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131 } |
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132 |
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133 ColumnVector |
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134 real (const ComplexColumnVector& a) |
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135 { |
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136 int a_len = a.length (); |
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137 ColumnVector retval; |
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138 if (a_len > 0) |
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139 retval = ColumnVector (real_dup (a.data (), a_len), a_len); |
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140 return retval; |
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141 } |
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142 |
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143 ColumnVector |
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144 imag (const ComplexColumnVector& a) |
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145 { |
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146 int a_len = a.length (); |
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147 ColumnVector retval; |
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148 if (a_len > 0) |
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149 retval = ColumnVector (imag_dup (a.data (), a_len), a_len); |
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150 return retval; |
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151 } |
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152 |
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153 // resize is the destructive equivalent for this one |
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154 |
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155 ColumnVector |
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156 ColumnVector::extract (int r1, int r2) const |
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157 { |
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158 if (r1 > r2) { int tmp = r1; r1 = r2; r2 = tmp; } |
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159 |
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160 int new_r = r2 - r1 + 1; |
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161 |
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162 ColumnVector result (new_r); |
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163 |
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164 for (int i = 0; i < new_r; i++) |
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165 result.elem (i) = elem (r1+i); |
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166 |
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167 return result; |
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168 } |
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169 |
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170 // column vector by column vector -> column vector operations |
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171 |
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172 ColumnVector& |
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173 ColumnVector::operator += (const ColumnVector& a) |
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174 { |
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175 int len = length (); |
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176 if (len != a.length ()) |
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177 { |
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178 (*current_liboctave_error_handler) |
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179 ("nonconformant vector += operation attempted"); |
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180 return *this; |
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181 } |
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182 |
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183 if (len == 0) |
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184 return *this; |
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185 |
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186 double *d = fortran_vec (); // Ensures only one reference to my privates! |
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187 |
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188 add2 (d, a.data (), len); |
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189 return *this; |
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190 } |
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191 |
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192 ColumnVector& |
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193 ColumnVector::operator -= (const ColumnVector& a) |
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194 { |
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195 int len = length (); |
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196 if (len != a.length ()) |
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197 { |
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198 (*current_liboctave_error_handler) |
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199 ("nonconformant vector -= operation attempted"); |
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200 return *this; |
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201 } |
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202 |
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203 if (len == 0) |
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204 return *this; |
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205 |
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206 double *d = fortran_vec (); // Ensures only one reference to my privates! |
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207 |
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208 subtract2 (d, a.data (), len); |
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209 return *this; |
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210 } |
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211 |
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212 // matrix by column vector -> column vector operations |
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213 |
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214 ColumnVector |
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215 operator * (const Matrix& m, const ColumnVector& a) |
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216 { |
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217 int nr = m.rows (); |
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218 int nc = m.cols (); |
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219 if (nc != a.length ()) |
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220 { |
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221 (*current_liboctave_error_handler) |
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222 ("nonconformant matrix multiplication attempted"); |
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223 return ColumnVector (); |
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224 } |
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225 |
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226 if (nr == 0 || nc == 0) |
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227 return ColumnVector (0); |
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228 |
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229 int ld = nr; |
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230 |
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231 double *y = new double [nr]; |
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232 |
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233 F77_FCN (dgemv, DGEMV) ("N", nr, nc, 1.0, m.data (), ld, a.data (), |
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234 1, 0.0, y, 1, 1L); |
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235 |
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236 return ColumnVector (y, nr); |
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237 } |
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238 |
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239 // diagonal matrix by column vector -> column vector operations |
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240 |
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241 ColumnVector |
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242 operator * (const DiagMatrix& m, const ColumnVector& a) |
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243 { |
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244 int nr = m.rows (); |
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245 int nc = m.cols (); |
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246 int a_len = a.length (); |
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247 if (nc != a_len) |
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248 { |
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249 (*current_liboctave_error_handler) |
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250 ("nonconformant matrix multiplication attempted"); |
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251 return ColumnVector (); |
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252 } |
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253 |
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254 if (nc == 0 || nr == 0) |
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255 return ColumnVector (0); |
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256 |
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257 ColumnVector result (nr); |
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258 |
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259 for (int i = 0; i < a_len; i++) |
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260 result.elem (i) = a.elem (i) * m.elem (i, i); |
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261 |
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262 for (i = a_len; i < nr; i++) |
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263 result.elem (i) = 0.0; |
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264 |
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265 return result; |
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266 } |
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267 |
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268 // other operations |
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269 |
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270 ColumnVector |
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271 map (d_d_Mapper f, const ColumnVector& a) |
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272 { |
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273 ColumnVector b (a); |
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274 b.map (f); |
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275 return b; |
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276 } |
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277 |
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278 ColumnVector |
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279 map (d_c_Mapper f, const ComplexColumnVector& a) |
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280 { |
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281 int a_len = a.length (); |
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282 ColumnVector b (a_len); |
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283 for (int i = 0; i < a_len; i++) |
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284 b.elem (i) = f (a.elem (i)); |
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285 return b; |
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286 } |
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287 |
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288 void |
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289 ColumnVector::map (d_d_Mapper f) |
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290 { |
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291 for (int i = 0; i < length (); i++) |
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292 elem (i) = f (elem (i)); |
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293 } |
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294 |
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295 double |
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296 ColumnVector::min (void) const |
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297 { |
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298 int len = length (); |
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299 if (len == 0) |
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300 return 0.0; |
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301 |
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302 double res = elem (0); |
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303 |
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304 for (int i = 1; i < len; i++) |
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305 if (elem (i) < res) |
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306 res = elem (i); |
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307 |
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308 return res; |
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309 } |
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310 |
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311 double |
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312 ColumnVector::max (void) const |
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313 { |
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314 int len = length (); |
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315 if (len == 0) |
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316 return 0.0; |
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317 |
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318 double res = elem (0); |
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319 |
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320 for (int i = 1; i < len; i++) |
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321 if (elem (i) > res) |
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322 res = elem (i); |
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323 |
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324 return res; |
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325 } |
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326 |
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327 ostream& |
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328 operator << (ostream& os, const ColumnVector& a) |
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329 { |
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330 // int field_width = os.precision () + 7; |
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331 for (int i = 0; i < a.length (); i++) |
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332 os << /* setw (field_width) << */ a.elem (i) << "\n"; |
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333 return os; |
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334 } |
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335 |
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336 istream& |
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337 operator >> (istream& is, ColumnVector& a) |
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338 { |
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339 int len = a.length(); |
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340 |
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341 if (len < 1) |
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342 is.clear (ios::badbit); |
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343 else |
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344 { |
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345 double tmp; |
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346 for (int i = 0; i < len; i++) |
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347 { |
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348 is >> tmp; |
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349 if (is) |
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350 a.elem (i) = tmp; |
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351 else |
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352 break; |
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353 } |
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354 } |
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355 return is; |
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356 } |
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357 |
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358 /* |
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359 ;;; Local Variables: *** |
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360 ;;; mode: C++ *** |
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361 ;;; page-delimiter: "^/\\*" *** |
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362 ;;; End: *** |
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363 */ |
