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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, 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 "oct-map.h" |
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39 #include "help.h" |
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40 #include "utils.h" |
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41 #include "error.h" |
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42 #include "gripes.h" |
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43 #include "defun.h" |
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44 |
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45 #ifndef MIN |
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46 #define MIN(a,b) ((a) < (b) ? (a) : (b)) |
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47 #endif |
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48 |
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49 #ifndef ABS |
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50 #define ABS(x) (((x) < 0) ? (-x) : (x)) |
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51 #endif |
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52 |
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53 DEFUN ("all", Fall, Sall, 1, 1, |
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54 "all (X): are all elements of X nonzero?") |
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55 { |
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56 Octave_object retval; |
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57 |
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58 int nargin = args.length (); |
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59 |
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60 if (nargin == 1 && args(0).is_defined ()) |
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61 retval = args(0).all (); |
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62 else |
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63 print_usage ("all"); |
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64 |
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65 return retval; |
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66 } |
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67 |
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68 DEFUN ("any", Fany, Sany, 1, 1, |
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69 "any (X): are any elements of X nonzero?") |
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70 { |
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71 Octave_object retval; |
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72 |
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73 int nargin = args.length (); |
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74 |
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75 if (nargin == 1 && args(0).is_defined ()) |
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76 retval = args(0).any (); |
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77 else |
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78 print_usage ("any"); |
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79 |
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80 return retval; |
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81 } |
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82 |
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83 // These mapping functions may also be useful in other places, eh? |
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84 |
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85 typedef double (*d_dd_fcn) (double, double); |
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86 |
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87 static Matrix |
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88 map (d_dd_fcn f, double x, const Matrix& y) |
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89 { |
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90 int nr = y.rows (); |
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91 int nc = y.columns (); |
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92 |
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93 Matrix retval (nr, nc); |
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94 |
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95 for (int j = 0; j < nc; j++) |
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96 for (int i = 0; i < nr; i++) |
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97 retval.elem (i, j) = f (x, y.elem (i, j)); |
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98 |
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99 return retval; |
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100 } |
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101 |
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102 static Matrix |
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103 map (d_dd_fcn f, const Matrix& x, double y) |
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104 { |
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105 int nr = x.rows (); |
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106 int nc = x.columns (); |
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107 |
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108 Matrix retval (nr, nc); |
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109 |
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110 for (int j = 0; j < nc; j++) |
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111 for (int i = 0; i < nr; i++) |
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112 retval.elem (i, j) = f (x.elem (i, j), y); |
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113 |
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114 return retval; |
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115 } |
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116 |
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117 static Matrix |
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118 map (d_dd_fcn f, const Matrix& x, const Matrix& y) |
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119 { |
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120 int x_nr = x.rows (); |
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121 int x_nc = x.columns (); |
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122 |
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123 int y_nr = y.rows (); |
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124 int y_nc = y.columns (); |
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125 |
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126 assert (x_nr == y_nr && x_nc == y_nc); |
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127 |
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128 Matrix retval (x_nr, x_nc); |
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129 |
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130 for (int j = 0; j < x_nc; j++) |
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131 for (int i = 0; i < x_nr; i++) |
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132 retval.elem (i, j) = f (x.elem (i, j), y.elem (i, j)); |
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133 |
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134 return retval; |
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135 } |
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136 |
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137 DEFUN ("atan2", Fatan2, Satan2, 2, 1, |
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138 "atan2 (Y, X): atan (Y / X) in range -pi to pi") |
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139 { |
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140 Octave_object retval; |
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141 |
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142 int nargin = args.length (); |
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143 |
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144 if (nargin == 2 && args(0).is_defined () && args(1).is_defined ()) |
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145 { |
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146 tree_constant arg_y = args(0); |
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147 tree_constant arg_x = args(1); |
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148 |
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149 int y_nr = arg_y.rows (); |
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150 int y_nc = arg_y.columns (); |
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151 |
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152 int x_nr = arg_x.rows (); |
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153 int x_nc = arg_x.columns (); |
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154 |
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155 int arg_y_empty = empty_arg ("atan2", y_nr, y_nc); |
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156 int arg_x_empty = empty_arg ("atan2", x_nr, x_nc); |
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157 |
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158 if (arg_y_empty > 0 && arg_x_empty > 0) |
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159 return Matrix (); |
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160 else if (arg_y_empty || arg_x_empty) |
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161 return retval; |
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162 |
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163 int y_is_scalar = (y_nr == 1 && y_nc == 1); |
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164 int x_is_scalar = (x_nr == 1 && x_nc == 1); |
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165 |
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166 if (y_is_scalar && x_is_scalar) |
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167 { |
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168 double y = arg_y.double_value (); |
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169 |
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170 if (! error_state) |
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171 { |
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172 double x = arg_x.double_value (); |
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173 |
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174 if (! error_state) |
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175 retval = atan2 (y, x); |
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176 } |
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177 } |
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178 else if (y_is_scalar) |
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