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1 // data.cc -*- C++ -*- |
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2 /* |
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3 |
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4 Copyright (C) 1992, 1993, 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 /* |
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25 |
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26 The function builtin_pwd adapted from a similar function from GNU |
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27 Bash, the Bourne Again SHell, copyright (C) 1987, 1989, 1991 Free |
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28 Software Foundation, Inc. |
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29 |
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30 */ |
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31 |
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32 #ifdef HAVE_CONFIG_H |
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33 #include "config.h" |
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34 #endif |
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35 |
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36 #include "tree-const.h" |
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37 #include "user-prefs.h" |
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38 #include "help.h" |
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523
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39 #include "utils.h" |
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40 #include "error.h" |
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41 #include "defun.h" |
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42 |
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43 #ifndef MIN |
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44 #define MIN(a,b) ((a) < (b) ? (a) : (b)) |
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45 #endif |
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46 |
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47 DEFUN ("all", Fall, Sall, 2, 1, |
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48 "all (X): are all elements of X nonzero?") |
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49 { |
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50 Octave_object retval; |
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51 |
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52 int nargin = args.length (); |
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53 |
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54 if (nargin != 2) |
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55 print_usage ("all"); |
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56 else if (nargin > 0 && args(1).is_defined ()) |
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57 retval = args(1).all (); |
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58 |
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59 return retval; |
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60 } |
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61 |
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62 DEFUN ("any", Fany, Sany, 2, 1, |
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63 "any (X): are any elements of X nonzero?") |
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64 { |
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65 Octave_object retval; |
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66 |
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67 int nargin = args.length (); |
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68 |
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69 if (nargin != 2) |
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70 print_usage ("any"); |
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71 else if (nargin > 0 && args(1).is_defined ()) |
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72 retval = args(1).any (); |
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73 |
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74 return retval; |
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75 } |
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76 |
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77 DEFUN ("cumprod", Fcumprod, Scumprod, 2, 1, |
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78 "cumprod (X): cumulative products") |
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79 { |
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80 Octave_object retval; |
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81 |
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82 int nargin = args.length (); |
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83 |
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84 if (nargin != 2) |
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85 print_usage ("cumprod"); |
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86 else if (nargin > 0 && args(1).is_defined ()) |
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87 retval = args(1).cumprod (); |
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88 |
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89 return retval; |
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90 } |
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91 |
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92 DEFUN ("cumsum", Fcumsum, Scumsum, 2, 1, |
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93 "cumsum (X): cumulative sums") |
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94 { |
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95 Octave_object retval; |
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96 |
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97 int nargin = args.length (); |
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98 |
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99 if (nargin != 2) |
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100 print_usage ("cumsum"); |
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101 else if (nargin > 0 && args(1).is_defined ()) |
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102 retval = args(1).cumsum (); |
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103 |
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104 return retval; |
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105 } |
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106 |
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107 DEFUN ("diag", Fdiag, Sdiag, 3, 1, |
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108 "diag (X [,k]): form/extract diagonals") |
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109 { |
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110 Octave_object retval; |
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111 |
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112 int nargin = args.length (); |
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113 |
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114 if (nargin == 2) |
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115 retval = args(1).diag (); |
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116 else if (nargin == 3) |
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117 retval = args(1).diag (args(2)); |
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118 else |
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119 print_usage ("diag"); |
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120 |
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121 return retval; |
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122 } |
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123 |
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124 DEFUN ("isstr", Fisstr, Sisstr, 2, 1, |
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125 "isstr (X): return 1 if X is a string, 0 otherwise") |
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126 { |
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127 Octave_object retval; |
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128 |
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129 int nargin = args.length (); |
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130 |
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131 if (nargin != 2) |
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132 print_usage ("isstr"); |
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133 else |
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134 { |
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135 if (nargin > 0 && args(1).is_defined ()) |
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136 retval = args(1).isstr (); |
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137 } |
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138 |
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139 return retval; |
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140 } |
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141 |
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142 DEFUN ("prod", Fprod, Sprod, 2, 1, |
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143 "prod (X): products") |
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144 { |
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145 Octave_object retval; |
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146 |
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147 int nargin = args.length (); |
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148 |
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149 if (nargin != 2) |
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150 print_usage ("prod"); |
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151 else if (nargin > 0 && args(1).is_defined ()) |
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152 retval = args(1).prod (); |
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153 |
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154 return retval; |
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155 } |
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156 |
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157 DEFUN ("setstr", Fsetstr, Ssetstr, 2, 1, |
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158 "setstr (V): convert a vector to a string") |
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159 { |
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160 Octave_object retval; |
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161 |
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162 int nargin = args.length (); |
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163 |
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164 if (nargin == 2) |
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165 retval = args(1).convert_to_str (); |
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166 else |
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167 print_usage ("setstr"); |
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168 |
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169 return retval; |
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170 } |
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171 |
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172 DEFUN ("size", Fsize, Ssize, 2, 1, |
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173 "[m, n] = size (x): return rows and columns of X") |
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174 { |
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175 Octave_object retval; |
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176 |
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177 int nargin = args.length (); |
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178 |
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179 if (nargin != 2) |
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180 print_usage ("size"); |
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181 else |
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182 { |
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183 if (nargin > 0 && args(1).is_defined ()) |
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184 { |
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185 int nr = args(1).rows (); |
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186 int nc = args(1).columns (); |
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187 if (nargout == 0 || nargout == 1) |
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188 { |
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189 Matrix m (1, 2); |
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190 m.elem (0, 0) = nr; |
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191 m.elem (0, 1) = nc; |
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192 retval = m; |
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193 } |
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194 else if (nargout == 2) |
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195 { |
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196 retval(1) = (double) nc; |
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197 retval(0) = (double) nr; |
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198 } |
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199 else |
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200 print_usage ("size"); |
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201 } |
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202 } |
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203 |
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204 return retval; |
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205 } |
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206 |
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207 DEFUN ("sum", Fsum, Ssum, 2, 1, |
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208 "sum (X): sum of elements") |
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209 { |
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210 Octave_object retval; |
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211 |
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212 int nargin = args.length (); |
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213 |
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214 if (nargin != 2) |
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215 print_usage ("sum"); |
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216 else |
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217 { |
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218 if (nargin > 0 && args(1).is_defined ()) |
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219 retval = args(1).sum (); |
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220 } |
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221 |
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222 return retval; |
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223 } |
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224 |
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225 DEFUN ("sumsq", Fsumsq, Ssumsq, 2, 1, |
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226 "sumsq (X): sum of squares of elements") |
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227 { |
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228 Octave_object retval; |
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229 |
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230 int nargin = args.length (); |
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231 |
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232 if (nargin != 2) |
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233 print_usage ("sumsq"); |
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234 else if (nargin > 0 && args(1).is_defined ()) |
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235 retval = args(1).sumsq (); |
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236 |
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237 return retval; |
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238 } |
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239 |
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240 static void |
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241 check_dimensions (int& nr, int& nc, const char *warnfor) |
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242 { |
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243 if (nr < 0 || nc < 0) |
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244 { |
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245 if (user_pref.treat_neg_dim_as_zero) |
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246 { |
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247 nr = (nr < 0) ? 0 : nr; |
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248 nc = (nc < 0) ? 0 : nc; |
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249 } |
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250 else |
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251 error ("%s: can't create a matrix with negative dimensions", |
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252 warnfor); |
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253 } |
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254 } |
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255 |
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256 static void |
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257 get_dimensions (const tree_constant& a, const char *warn_for, |
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258 int& nr, int& nc) |
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259 { |
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260 tree_constant tmpa = a.make_numeric (); |
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261 |
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262 if (tmpa.is_scalar_type ()) |
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263 { |
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264 double tmp = tmpa.double_value (); |
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265 nr = nc = NINT (tmp); |
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266 } |
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267 else |
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268 { |
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269 nr = tmpa.rows (); |
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270 nc = tmpa.columns (); |
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271 |
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272 if ((nr == 1 && nc == 2) || (nr == 2 && nc == 1)) |
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273 { |
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274 ColumnVector v = tmpa.to_vector (); |
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275 |
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276 nr = NINT (v.elem (0)); |
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277 nc = NINT (v.elem (1)); |
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278 } |
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279 else |
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280 warning ("%s (A): use %s (size (A)) instead", warn_for, warn_for); |
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281 } |
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282 |
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283 check_dimensions (nr, nc, warn_for); // May set error_state. |
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284 } |
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285 |
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286 static void |
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287 get_dimensions (const tree_constant& a, const tree_constant& b, |
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288 const char *warn_for, int& nr, int& nc) |
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289 { |
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290 tree_constant tmpa = a.make_numeric (); |
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291 tree_constant tmpb = b.make_numeric (); |
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292 |
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293 if (tmpa.is_scalar_type () && tmpb.is_scalar_type ()) |
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294 { |
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295 nr = NINT (tmpa.double_value ()); |
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296 nc = NINT (tmpb.double_value ()); |
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297 |
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298 check_dimensions (nr, nc, warn_for); // May set error_state. |
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299 } |
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300 else |
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301 error ("%s: expecting two scalar arguments", warn_for); |
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302 } |
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303 |
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304 static tree_constant |
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305 fill_matrix (const tree_constant& a, double val, const char *warn_for) |
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306 { |
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307 int nr, nc; |
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308 get_dimensions (a, warn_for, nr, nc); |
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309 |
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310 if (error_state) |
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311 return tree_constant (); |
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312 |
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313 Matrix m (nr, nc, val); |
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314 |
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315 return m; |
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316 } |
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317 |
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318 static tree_constant |
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319 fill_matrix (const tree_constant& a, const tree_constant& b, |
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320 double val, const char *warn_for) |
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321 { |
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322 int nr, nc; |
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323 get_dimensions (a, b, warn_for, nr, nc); // May set error_state. |
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324 |
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325 if (error_state) |
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326 return tree_constant (); |
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327 |
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328 Matrix m (nr, nc, val); |
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329 |
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330 return m; |
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331 } |
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332 |
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333 DEFUN ("ones", Fones, Sones, 3, 1, |
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334 "ones (N), ones (N, M), ones (X): create a matrix of all ones") |
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335 { |
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336 Octave_object retval; |
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337 |
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338 int nargin = args.length (); |
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339 |
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340 switch (nargin) |
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341 { |
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342 case 1: |
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343 retval = 1.0; |
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344 break; |
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345 case 2: |
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346 retval = fill_matrix (args(1), 1.0, "ones"); |
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347 break; |
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348 case 3: |
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349 retval = fill_matrix (args(1), args(2), 1.0, "ones"); |
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350 break; |
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351 default: |
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352 print_usage ("ones"); |
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353 break; |
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354 } |
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355 |
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356 return retval; |
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357 } |
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358 |
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359 DEFUN ("zeros", Fzeros, Szeros, 3, 1, |
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360 "zeros (N), zeros (N, M), zeros (X): create a matrix of all zeros") |
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361 { |
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362 Octave_object retval; |
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363 |
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364 int nargin = args.length (); |
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365 |
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366 switch (nargin) |
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367 { |
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368 case 1: |
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369 retval = 0.0; |
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370 break; |
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371 case 2: |
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372 retval = fill_matrix (args(1), 0.0, "zeros"); |
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373 break; |
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374 case 3: |
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375 retval = fill_matrix (args(1), args(2), 0.0, "zeros"); |
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376 break; |
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377 default: |
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378 print_usage ("zeros"); |
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379 break; |
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380 } |
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381 |
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382 return retval; |
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383 } |
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384 |
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385 static tree_constant |
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386 identity_matrix (const tree_constant& a) |
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387 { |
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388 int nr, nc; |
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389 get_dimensions (a, "eye", nr, nc); // May set error_state. |
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390 |
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391 if (error_state) |
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392 return tree_constant (); |
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393 |
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394 Matrix m (nr, nc, 0.0); |
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395 |
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396 if (nr > 0 && nc > 0) |
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397 { |
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398 int n = MIN (nr, nc); |
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399 for (int i = 0; i < n; i++) |
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400 m.elem (i, i) = 1.0; |
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401 } |
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402 |
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403 return m; |
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404 } |
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405 |
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406 static tree_constant |
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407 identity_matrix (const tree_constant& a, const tree_constant& b) |
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408 { |
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409 int nr, nc; |
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410 get_dimensions (a, b, "eye", nr, nc); // May set error_state. |
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411 |
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412 if (error_state) |
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413 return tree_constant (); |
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414 |
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415 Matrix m (nr, nc, 0.0); |
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416 |
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417 if (nr > 0 && nc > 0) |
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418 { |
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419 int n = MIN (nr, nc); |
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420 for (int i = 0; i < n; i++) |
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421 m.elem (i, i) = 1.0; |
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422 } |
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423 |
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424 return m; |
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425 } |
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426 |
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427 DEFUN ("eye", Feye, Seye, 3, 1, |
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428 "eye (N), eye (N, M), eye (X): create an identity matrix") |
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429 { |
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430 Octave_object retval; |
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431 |
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432 int nargin = args.length (); |
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433 |
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434 switch (nargin) |
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435 { |
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436 case 1: |
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437 retval = 1.0; |
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438 break; |
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523
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439 case 2: |
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440 retval = identity_matrix (args(1)); |
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441 break; |
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442 case 3: |
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443 retval = identity_matrix (args(1), args(2)); |
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444 break; |
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445 default: |
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446 print_usage ("eye"); |
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447 break; |
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448 } |
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449 |
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450 return retval; |
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451 } |
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452 |
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453 /* |
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454 ;;; Local Variables: *** |
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455 ;;; mode: C++ *** |
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456 ;;; page-delimiter: "^/\\*" *** |
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457 ;;; End: *** |
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458 */ |
