Mercurial > octave
annotate libinterp/corefcn/dlmread.cc @ 20831:35241c4b696c
eliminate return statements after calls to error
* Cell.cc, __ichol__.cc, __lin_interpn__.cc, __pchip_deriv__.cc,
besselj.cc, cellfun.cc, colloc.cc, debug.cc, dlmread.cc,
dynamic-ld.cc, filter.cc, find.cc, gl2ps-renderer.cc, load-path.cc,
load-save.cc, ls-mat4.cc, ls-mat5.cc, ls-oct-text.cc, luinc.cc,
max.cc, nproc.cc, oct-hist.cc, oct-map.cc, oct-obj.cc, oct-stream.cc,
ordschur.cc, pinv.cc, pr-output.cc, profiler.cc, psi.cc, quadcc.cc,
qz.cc, rand.cc, strfind.cc, strfns.cc, sysdep.cc, toplev.cc, tril.cc,
typecast.cc, urlwrite.cc, utils.cc, variables.cc: Eliminate return
statements after calls to error.
author | John W. Eaton <jwe@octave.org> |
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date | Wed, 09 Dec 2015 14:00:43 -0500 |
parents | 8bb38ba1bad6 |
children | 1142cf6abc0d |
rev | line source |
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1 /* |
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2 |
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maint: Update copyright notices for 2015.
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3 Copyright (C) 2008-2015 Jonathan Stickel |
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4 Copyright (C) 2010 Jaroslav Hajek |
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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 3 of the License, or (at your |
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11 option) any 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, see |
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20 <http://www.gnu.org/licenses/>. |
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21 |
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22 */ |
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23 |
7581 | 24 // Adapted from previous version of dlmread.occ as authored by Kai |
25 // Habel, but core code has been completely re-written. | |
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26 |
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27 #ifdef HAVE_CONFIG_H |
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28 #include <config.h> |
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29 #endif |
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30 |
7581 | 31 #include <cctype> |
32 #include <fstream> | |
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33 #include <limits> |
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35 #include "file-ops.h" |
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36 #include "lo-ieee.h" |
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37 |
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38 #include "defun.h" |
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39 #include "oct-stream.h" |
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40 #include "error.h" |
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41 #include "oct-obj.h" |
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42 #include "utils.h" |
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43 |
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44 static const octave_idx_type idx_max = |
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45 std::numeric_limits<octave_idx_type>::max (); |
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46 |
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47 static bool |
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48 read_cell_spec (std::istream& is, octave_idx_type& row, octave_idx_type& col) |
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49 { |
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50 bool stat = false; |
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51 |
7581 | 52 if (is.peek () == std::istream::traits_type::eof ()) |
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53 stat = true; |
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54 else |
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55 { |
7581 | 56 if (::isalpha (is.peek ())) |
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57 { |
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58 col = 0; |
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59 while (is && ::isalpha (is.peek ())) |
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60 { |
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61 char ch = is.get (); |
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62 col *= 26; |
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63 if (ch >= 'a') |
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64 col += ch - 'a' + 1; |
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65 else |
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66 col += ch - 'A' + 1; |
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67 } |
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68 col --; |
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69 |
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70 if (is) |
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71 { |
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72 is >> row; |
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73 row --; |
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74 if (is) |
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75 stat = true; |
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76 } |
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77 } |
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78 } |
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79 |
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80 return stat; |
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81 } |
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82 |
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83 static bool |
7581 | 84 parse_range_spec (const octave_value& range_spec, |
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85 octave_idx_type& rlo, octave_idx_type& clo, |
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86 octave_idx_type& rup, octave_idx_type& cup) |
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87 { |
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88 bool stat = true; |
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89 |
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90 if (range_spec.is_string ()) |
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91 { |
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92 std::istringstream is (range_spec.string_value ()); |
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93 char ch = is.peek (); |
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94 |
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95 if (ch == '.' || ch == ':') |
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96 { |
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97 rlo = 0; |
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98 clo = 0; |
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99 ch = is.get (); |
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100 if (ch == '.') |
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101 { |
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102 ch = is.get (); |
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103 if (ch != '.') |
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104 stat = false; |
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105 } |
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106 } |
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107 else |
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108 { |
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109 stat = read_cell_spec (is, rlo, clo); |
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110 |
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111 if (stat) |
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112 { |
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113 ch = is.peek (); |
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114 |
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115 if (ch == '.' || ch == ':') |
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116 { |
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117 ch = is.get (); |
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118 if (ch == '.') |
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119 { |
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120 ch = is.get (); |
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121 if (!is || ch != '.') |
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122 stat = false; |
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123 } |
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124 |
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125 rup = idx_max - 1; |
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126 cup = idx_max - 1; |
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127 } |
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128 else |
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129 { |
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130 rup = rlo; |
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131 cup = clo; |
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132 if (!is || !is.eof ()) |
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133 stat = false; |
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134 } |
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135 } |
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136 } |
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137 |
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138 if (stat && is && !is.eof ()) |
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139 stat = read_cell_spec (is, rup, cup); |
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140 |
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142 stat = false; |
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143 } |
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144 else if (range_spec.is_real_matrix () && range_spec.numel () == 4) |
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145 { |
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147 // double --> unsigned int |
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148 rlo = static_cast<octave_idx_type> (range(0)); |
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149 clo = static_cast<octave_idx_type> (range(1)); |
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150 rup = static_cast<octave_idx_type> (range(2)); |
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151 cup = static_cast<octave_idx_type> (range(3)); |
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152 } |
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153 else |
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154 stat = false; |
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155 |
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156 return stat; |
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157 } |
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158 |
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159 DEFUN (dlmread, args, , |
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160 "-*- texinfo -*-\n\ |
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161 @deftypefn {Built-in Function} {@var{data} =} dlmread (@var{file})\n\ |
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162 @deftypefnx {Built-in Function} {@var{data} =} dlmread (@var{file}, @var{sep})\n\ |
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163 @deftypefnx {Built-in Function} {@var{data} =} dlmread (@var{file}, @var{sep}, @var{r0}, @var{c0})\n\ |
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164 @deftypefnx {Built-in Function} {@var{data} =} dlmread (@var{file}, @var{sep}, @var{range})\n\ |
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165 @deftypefnx {Built-in Function} {@var{data} =} dlmread (@dots{}, \"emptyvalue\", @var{EMPTYVAL})\n\ |
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166 Read the matrix @var{data} from a text file which uses the delimiter\n\ |
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167 @var{sep} between data values.\n\ |
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168 \n\ |
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169 If @var{sep} is not defined the separator between fields is determined from\n\ |
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170 the file itself.\n\ |
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171 \n\ |
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172 Given two scalar arguments @var{r0} and @var{c0}, these define the starting\n\ |
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173 row and column of the data to be read. These values are indexed from zero,\n\ |
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174 such that the first row corresponds to an index of zero.\n\ |
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175 \n\ |
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176 The @var{range} parameter may be a 4-element vector containing the upper\n\ |
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177 left and lower right corner @code{[@var{R0},@var{C0},@var{R1},@var{C1}]}\n\ |
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178 where the lowest index value is zero. Alternatively, a spreadsheet style\n\ |
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179 range such as @qcode{\"A2..Q15\"} or @qcode{\"T1:AA5\"} can be used. The\n\ |
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180 lowest alphabetical index @qcode{'A'} refers to the first column. The\n\ |
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181 lowest row index is 1.\n\ |
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182 \n\ |
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183 @var{file} should be a filename or file id given by @code{fopen}. In the\n\ |
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184 latter case, the file is read until end of file is reached.\n\ |
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185 \n\ |
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186 The @qcode{\"emptyvalue\"} option may be used to specify the value used to\n\ |
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187 fill empty fields. The default is zero.\n\ |
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188 @seealso{csvread, textscan, textread, dlmwrite}\n\ |
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189 @end deftypefn") |
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190 { |
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191 octave_value_list retval; |
7581 | 192 |
193 int nargin = args.length (); | |
194 | |
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195 double empty_value = 0.0; |
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196 |
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197 if (nargin > 2 && args(nargin-2).is_string () |
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198 && args(nargin-2).string_value () == "emptyvalue") |
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199 { |
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200 empty_value = args(nargin-1).double_value (); |
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201 |
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202 nargin -= 2; |
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203 } |
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204 |
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205 if (nargin < 1 || nargin > 4) |
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206 print_usage (); |
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207 |
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208 std::istream *input = 0; |
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209 std::ifstream input_file; |
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210 |
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211 if (args(0).is_string ()) |
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212 { |
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213 // Filename. |
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214 std::string fname (args(0).string_value ()); |
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215 |
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216 std::string tname = file_ops::tilde_expand (fname); |
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217 |
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218 input_file.open (tname.c_str (), std::ios::in); |
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219 |
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220 if (! input_file) |
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221 error ("dlmread: unable to open file '%s'", fname.c_str ()); |
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222 |
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223 input = &input_file; |
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224 } |
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225 else if (args(0).is_scalar_type ()) |
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226 { |
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227 octave_stream is = octave_stream_list::lookup (args(0), "dlmread"); |
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228 |
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229 input = is.input_stream (); |
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230 |
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231 if (! input) |
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232 error ("dlmread: stream FILE not open for input"); |
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233 } |
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234 else |
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235 error ("dlmread: FILE argument must be a string or file id"); |
7581 | 236 |
237 // Set default separator. | |
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238 std::string sep; |
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239 if (nargin > 1) |
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240 { |
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241 if (args(1).is_sq_string ()) |
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242 sep = do_string_escapes (args(1).string_value ()); |
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243 else |
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244 sep = args(1).string_value (); |
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245 } |
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246 |
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248 octave_idx_type r0 = 0; |
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249 octave_idx_type c0 = 0; |
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250 octave_idx_type r1 = idx_max-1; |
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251 octave_idx_type c1 = idx_max-1; |
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252 if (nargin > 2) |
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253 { |
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254 if (nargin == 3) |
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255 { |
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256 if (!parse_range_spec (args(2), r0, c0, r1, c1)) |
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257 error ("dlmread: error parsing RANGE"); |
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258 } |
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259 else if (nargin == 4) |
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260 { |
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261 r0 = args(2).idx_type_value (); |
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262 c0 = args(3).idx_type_value (); |
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263 } |
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264 |
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265 if (r0 < 0 || c0 < 0) |
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266 error ("dlmread: left & top must be positive"); |
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267 } |
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268 |
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269 octave_idx_type i = 0; |
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270 octave_idx_type j = 0; |
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271 octave_idx_type r = 1; |
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272 octave_idx_type c = 1; |
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273 octave_idx_type rmax = 0; |
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274 octave_idx_type cmax = 0; |
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276 Matrix rdata; |
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277 ComplexMatrix cdata; |
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278 |
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279 bool iscmplx = false; |
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280 bool sepflag = false; |
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281 |
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282 std::string line; |
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284 // Skip the r0 leading lines as these might be a header. |
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285 for (octave_idx_type m = 0; m < r0; m++) |
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286 getline (*input, line); |
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287 r1 -= r0; |
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289 std::istringstream tmp_stream; |
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291 // Read in the data one field at a time, growing the data matrix |
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292 // as needed. |
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293 while (getline (*input, line)) |
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294 { |
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295 // Skip blank lines for compatibility. |
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296 if (line.find_first_not_of (" \t") == std::string::npos) |
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297 continue; |
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298 |
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299 // To be compatible with matlab, blank separator should |
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300 // correspond to whitespace as delimter. |
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301 if (!sep.length ()) |
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302 { |
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303 size_t n = line.find_first_of (",:; \t", |
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304 line.find_first_of ("0123456789")); |
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305 if (n == std::string::npos) |
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306 { |
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307 sep = " \t"; |
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308 sepflag = true; |
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309 } |
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310 else |
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311 { |
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312 char ch = line.at (n); |
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313 |
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314 switch (line.at (n)) |
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315 { |
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316 case ' ': |
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317 case '\t': |
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318 sepflag = true; |
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319 sep = " \t"; |
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320 break; |
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321 |
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322 default: |
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323 sep = ch; |
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324 break; |
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325 } |
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326 } |
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327 } |
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328 |
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329 if (cmax == 0) |
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330 { |
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331 // Try to estimate the number of columns. Skip leading |
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332 // whitespace. |
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333 size_t pos1 = line.find_first_not_of (" \t"); |
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334 do |
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335 { |
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336 size_t pos2 = line.find_first_of (sep, pos1); |
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337 |
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338 if (sepflag && pos2 != std::string::npos) |
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339 // Treat consecutive separators as one. |
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340 { |
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341 pos2 = line.find_first_not_of (sep, pos2); |
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342 if (pos2 != std::string::npos) |
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343 pos2 -= 1; |
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344 else |
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345 pos2 = line.length () - 1; |
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346 } |
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347 |
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348 cmax++; |
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349 |
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350 if (pos2 != std::string::npos) |
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351 pos1 = pos2 + 1; |
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352 else |
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353 pos1 = std::string::npos; |
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355 } |
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356 while (pos1 != std::string::npos); |
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358 if (iscmplx) |
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359 cdata.resize (rmax, cmax); |
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360 else |
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361 rdata.resize (rmax, cmax); |
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DLD-FUNCTIONS/*.cc: untabify
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362 } |
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363 |
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364 r = (r > i + 1 ? r : i + 1); |
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365 j = 0; |
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366 // Skip leading whitespace. |
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367 size_t pos1 = line.find_first_not_of (" \t"); |
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368 do |
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Return an empty matrix, not error, from dlmread when file is empty (bug #45156).
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369 { |
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370 octave_quit (); |
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371 |
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372 size_t pos2 = line.find_first_of (sep, pos1); |
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373 std::string str = line.substr (pos1, pos2 - pos1); |
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374 |
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375 if (sepflag && pos2 != std::string::npos) |
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376 // Treat consecutive separators as one. |
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377 pos2 = line.find_first_not_of (sep, pos2) - 1; |
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378 |
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379 c = (c > j + 1 ? c : j + 1); |
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380 if (r > rmax || c > cmax) |
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381 { |
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382 // Use resize_and_fill for the case of not-equal |
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383 // length rows. |
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384 rmax = 2*r; |
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385 cmax = c; |
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386 if (iscmplx) |
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387 cdata.resize (rmax, cmax); |
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388 else |
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389 rdata.resize (rmax, cmax); |
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390 } |
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391 |
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392 tmp_stream.str (str); |
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393 tmp_stream.clear (); |
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394 |
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395 double x = octave_read_double (tmp_stream); |
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396 if (tmp_stream) |
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397 { |
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398 if (tmp_stream.eof ()) |
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399 { |
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|
400 if (iscmplx) |
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401 cdata(i,j++) = x; |
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402 else |
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|
403 rdata(i,j++) = x; |
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404 } |
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405 else if (std::toupper (tmp_stream.peek ()) == 'I') |
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406 { |
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407 // This is to allow pure imaginary numbers. |
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408 if (iscmplx) |
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409 cdata(i,j++) = x; |
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410 else |
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|
411 rdata(i,j++) = x; |
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412 } |
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|
413 else |
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|
414 { |
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|
415 double y = octave_read_double (tmp_stream); |
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416 |
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417 if (!iscmplx && y != 0.) |
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|
418 { |
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|
419 iscmplx = true; |
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420 cdata = ComplexMatrix (rdata); |
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|
421 } |
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|
422 |
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|
423 if (iscmplx) |
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|
424 cdata(i,j++) = Complex (x, y); |
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|
425 else |
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|
426 rdata(i,j++) = x; |
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|
427 } |
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diff
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|
428 } |
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|
429 else if (iscmplx) |
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|
430 cdata(i,j++) = empty_value; |
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|
431 else |
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|
432 rdata(i,j++) = empty_value; |
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diff
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|
433 |
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|
434 if (pos2 != std::string::npos) |
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|
435 pos1 = pos2 + 1; |
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|
436 else |
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|
437 pos1 = std::string::npos; |
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|
438 |
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diff
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|
439 } |
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|
440 while (pos1 != std::string::npos); |
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|
441 |
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|
442 if (i == r1) |
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|
443 break; |
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diff
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|
444 |
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|
445 i++; |
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|
446 } |
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|
447 |
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diff
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|
448 if (r1 >= r) |
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|
449 r1 = r - 1; |
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|
450 if (c1 >= c) |
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|
451 c1 = c - 1; |
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diff
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|
452 |
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|
453 // Now take the subset of the matrix if there are any values. |
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|
454 if (i > 0 || j > 0) |
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|
455 { |
7580
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Port dlmread, dlmwrite, csvread and csvwrite from octave-forge
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diff
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|
456 if (iscmplx) |
20555
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|
457 cdata = cdata.extract (0, c0, r1, c1); |
7580
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diff
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|
458 else |
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|
459 rdata = rdata.extract (0, c0, r1, c1); |
7580
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diff
changeset
|
460 } |
b4aa9ef3d3ef
Port dlmread, dlmwrite, csvread and csvwrite from octave-forge
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diff
changeset
|
461 |
20555
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|
462 if (iscmplx) |
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|
463 retval(0) = cdata; |
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|
464 else |
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|
465 retval(0) = rdata; |
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|
466 |
7580
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diff
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|
467 return retval; |
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diff
changeset
|
468 } |
b4aa9ef3d3ef
Port dlmread, dlmwrite, csvread and csvwrite from octave-forge
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parents:
diff
changeset
|
469 |
b4aa9ef3d3ef
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diff
changeset
|
470 /* |
b4aa9ef3d3ef
Port dlmread, dlmwrite, csvread and csvwrite from octave-forge
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diff
changeset
|
471 %!shared file |
19278
6ca096827123
Use tempname() rather than tmpnam() in core Octave.
Rik <rik@octave.org>
parents:
18112
diff
changeset
|
472 %! file = tempname (); |
7580
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diff
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|
473 %! fid = fopen (file, "wt"); |
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Port dlmread, dlmwrite, csvread and csvwrite from octave-forge
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|
474 %! fwrite (fid, "1, 2, 3\n4, 5, 6\n7, 8, 9\n10, 11, 12"); |
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|
475 %! fclose (fid); |
b4aa9ef3d3ef
Port dlmread, dlmwrite, csvread and csvwrite from octave-forge
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parents:
diff
changeset
|
476 |
14501
60e5cf354d80
Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
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14361
diff
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|
477 %!assert (dlmread (file), [1, 2, 3; 4, 5, 6; 7, 8, 9;10, 11, 12]) |
60e5cf354d80
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|
478 %!assert (dlmread (file, ","), [1, 2, 3; 4, 5, 6; 7, 8, 9; 10, 11, 12]) |
60e5cf354d80
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Rik <octave@nomad.inbox5.com>
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diff
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479 %!assert (dlmread (file, ",", [1, 0, 2, 1]), [4, 5; 7, 8]) |
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480 %!assert (dlmread (file, ",", "B1..C2"), [2, 3; 5, 6]) |
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481 %!assert (dlmread (file, ",", "B1:C2"), [2, 3; 5, 6]) |
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482 %!assert (dlmread (file, ",", "..C2"), [1, 2, 3; 4, 5, 6]) |
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483 %!assert (dlmread (file, ",", 0, 1), [2, 3; 5, 6; 8, 9; 11, 12]) |
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484 %!assert (dlmread (file, ",", "B1.."), [2, 3; 5, 6; 8, 9; 11, 12]) |
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485 %!error (dlmread (file, ",", [0 1])) |
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486 |
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487 %!test |
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488 %! unlink (file); |
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489 |
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490 %!shared file |
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491 %! file = tempname (); |
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492 %! fid = fopen (file, "wt"); |
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493 %! fwrite (fid, "1, 2, 3\n4+4i, 5, 6\n7, 8, 9\n10, 11, 12"); |
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494 %! fclose (fid); |
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495 |
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496 %!assert (dlmread (file), [1, 2, 3; 4 + 4i, 5, 6; 7, 8, 9; 10, 11, 12]) |
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497 %!assert (dlmread (file, ","), [1, 2, 3; 4 + 4i, 5, 6; 7, 8, 9; 10, 11, 12]) |
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498 %!assert (dlmread (file, ",", [1, 0, 2, 1]), [4 + 4i, 5; 7, 8]) |
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499 %!assert (dlmread (file, ",", "A2..B3"), [4 + 4i, 5; 7, 8]) |
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500 %!assert (dlmread (file, ",", "A2:B3"), [4 + 4i, 5; 7, 8]) |
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501 %!assert (dlmread (file, ",", "..B3"), [1, 2; 4 + 4i, 5; 7, 8]) |
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502 %!assert (dlmread (file, ",", 1, 0), [4 + 4i, 5, 6; 7, 8, 9; 10, 11, 12]) |
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503 %!assert (dlmread (file, ",", "A2.."), [4 + 4i, 5, 6; 7, 8, 9; 10, 11, 12]) |
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504 %!error (dlmread (file, ",", [0 1])) |
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505 |
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506 %!test |
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507 %! unlink (file); |
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508 */ |