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annotate scripts/io/dlmwrite.m @ 11542:695141f1c05c ss-3-3-55

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snapshot 3.3.55
author John W. Eaton <jwe@octave.org>
date Sat, 15 Jan 2011 04:53:04 -0500
parents fd0a3ac60b0e
children c792872f8942
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1 ## Copyright (C) 2002-2011 Paul Kienzle
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2 ##
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3 ## This file is part of Octave.
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4 ##
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5 ## Octave is free software; you can redistribute it and/or modify it
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6 ## under the terms of the GNU General Public License as published by
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7 ## the Free Software Foundation; either version 3 of the License, or (at
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8 ## your option) any later version.
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9 ##
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10 ## Octave is distributed in the hope that it will be useful, but
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 ## General Public License for more details.
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14 ##
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15 ## You should have received a copy of the GNU General Public License
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16 ## along with Octave; see the file COPYING. If not, see
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17 ## <http://www.gnu.org/licenses/>.
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18
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19 ## -*- texinfo -*-
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20 ## @deftypefn {Function File} {} dlmwrite (@var{file}, @var{M})
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21 ## @deftypefnx {Function File} {} dlmwrite (@var{file}, @var{M}, @var{delim}, @var{r}, @var{c})
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22 ## @deftypefnx {Function File} {} dlmwrite (@var{file}, @var{M}, @var{key}, @var{val} @dots{})
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23 ## @deftypefnx {Function File} {} dlmwrite (@var{file}, @var{M}, "-append", @dots{})
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24 ## Write the matrix @var{M} to the named file using delimiters.
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25 ##
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26 ## @var{file} should be a file name or writable file ID given by @code{fopen}.
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27 ##
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28 ## The parameter @var{delim} specifies the delimiter to use to separate
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29 ## values on a row.
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30 ##
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31 ## The value of @var{r} specifies the number of delimiter-only lines to
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32 ## add to the start of the file.
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33 ##
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34 ## The value of @var{c} specifies the number of delimiters to prepend to
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35 ## each line of data.
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36 ##
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37 ## If the argument @code{"-append"} is given, append to the end of the
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38 ## @var{file}.
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39 ##
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40 ## In addition, the following keyword value pairs may appear at the end
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41 ## of the argument list:
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42 ## @table @code
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43 ## @item "append"
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44 ## Either @samp{"on"} or @samp{"off"}. See @samp{"-append"} above.
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45 ##
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46 ## @item "delimiter"
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47 ## See @var{delim} above.
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48 ##
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49 ## @item "newline"
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50 ## The character(s) to use to separate each row. Three special cases
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51 ## exist for this option. @samp{"unix"} is changed into '\n',
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52 ## @samp{"pc"} is changed into '\r\n', and @samp{"mac"} is changed
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53 ## into '\r'. Other values for this option are kept as is.
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54 ##
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55 ## @item "roffset"
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56 ## See @var{r} above.
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57 ##
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58 ## @item "coffset"
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59 ## See @var{c} above.
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60 ##
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61 ## @item "precision"
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62 ## The precision to use when writing the file. It can either be a
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63 ## format string (as used by fprintf) or a number of significant digits.
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64 ## @end table
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65 ##
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66 ## @example
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67 ## dlmwrite ("file.csv", reshape (1:16, 4, 4));
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68 ## @end example
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69 ##
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70 ## @example
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71 ## dlmwrite ("file.tex", a, "delimiter", "&", "newline", "\\n")
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72 ## @end example
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73 ##
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74 ## @seealso{dlmread, csvread, csvwrite}
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75 ## @end deftypefn
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76
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77 ## Author: Paul Kienzle <pkienzle@users.sf.net>
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78 ##
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79 ## This program was originally granted to the public domain
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80 ##
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81 ## 2002-03-08 Paul Kienzle <pkienzle@users.sf.net>
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82 ## * Initial revision
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83 ## 2005-11-27 Bill Denney <bill@givebillmoney.com>
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84 ## * Significant modifications of the input arguements for additional
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85 ## functionality.
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86
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87 function dlmwrite (file, M, varargin)
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88
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89 if (nargin < 2 || ! ischar (file))
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90 print_usage ();
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91 endif
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92
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93 ## set defaults
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94 delim = ",";
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95 r = 0;
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96 c = 0;
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97 newline = "\n";
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98 if (ischar (M))
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99 precision = "%c";
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100 else
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101 precision = "%.16g";
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102 endif
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103 opentype = "wt";
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104
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105 ## process the input arguements
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106 i = 0;
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107 while (i < length (varargin))
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108 i = i + 1;
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109 if (strcmpi (varargin{i}, "delimiter"))
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110 i = i + 1;
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111 delim = varargin{i};
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112 elseif (strcmpi (varargin{i}, "newline"))
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113 i = i + 1;
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114 newline = varargin{i};
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115 if (strcmpi (newline, "unix"))
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116 newline = "\n";
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117 elseif (strcmpi (newline, "pc"))
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118 newline = "\r\n";
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119 elseif (strcmpi (newline, "mac"))
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120 newline = "\r";
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121 endif
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122 elseif (strcmpi (varargin{i}, "roffset"))
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123 i = i + 1;
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124 r = varargin{i};
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125 elseif (strcmpi (varargin{i}, "coffset"))
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126 i = i + 1;
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diff changeset
127 c = varargin{i};
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parents:
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128 elseif (strcmpi (varargin{i}, "precision"))
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129 i = i + 1;
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David Bateman <dbateman@free.fr>
parents:
diff changeset
130 precision = varargin{i};
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David Bateman <dbateman@free.fr>
parents:
diff changeset
131 if (! strcmpi (class (precision), "char"))
10626
044d9df4d79a Correctly set output precision (#29870) in dlmwrite
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diff changeset
132 precision = sprintf ("%%.%gg", precision);
7580
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133 endif
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parents:
diff changeset
134 elseif (strcmpi (varargin{i}, "-append"))
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David Bateman <dbateman@free.fr>
parents:
diff changeset
135 opentype = "at";
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David Bateman <dbateman@free.fr>
parents:
diff changeset
136 elseif (strcmpi (varargin{i}, "append"))
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David Bateman <dbateman@free.fr>
parents:
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137 i = i + 1;
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David Bateman <dbateman@free.fr>
parents:
diff changeset
138 if (strcmpi (varargin{i}, "on"))
10549
95c3e38098bf Untabify .m scripts
Rik <code@nomad.inbox5.com>
parents: 9630
diff changeset
139 opentype = "at";
7580
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parents:
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140 elseif (strcmpi (varargin{i}, "off"))
10549
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parents: 9630
diff changeset
141 opentype = "wt";
7580
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parents:
diff changeset
142 else
10549
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parents: 9630
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143 error ("dlmwrite: append must be \"on\" or \"off\".");
7580
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parents:
diff changeset
144 endif
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David Bateman <dbateman@free.fr>
parents:
diff changeset
145 else
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David Bateman <dbateman@free.fr>
parents:
diff changeset
146 if (i == 1)
10549
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Rik <code@nomad.inbox5.com>
parents: 9630
diff changeset
147 delim = varargin{i};
7580
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parents:
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148 elseif (i == 2)
10549
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Rik <code@nomad.inbox5.com>
parents: 9630
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149 r = varargin{i};
7580
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David Bateman <dbateman@free.fr>
parents:
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150 elseif (i == 3)
10549
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Rik <code@nomad.inbox5.com>
parents: 9630
diff changeset
151 c = varargin{i};
7580
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parents:
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152 else
10549
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Rik <code@nomad.inbox5.com>
parents: 9630
diff changeset
153 print_usage();
7580
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David Bateman <dbateman@free.fr>
parents:
diff changeset
154 endif
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David Bateman <dbateman@free.fr>
parents:
diff changeset
155 endif
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David Bateman <dbateman@free.fr>
parents:
diff changeset
156 endwhile
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parents:
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157
10936
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Jaroslav Hajek <highegg@gmail.com>
parents: 10793
diff changeset
158 if (ischar (file))
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Jaroslav Hajek <highegg@gmail.com>
parents: 10793
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159 [fid, msg] = fopen (file, opentype);
1d761a30c3fb support file IDs in dlmwrite
Jaroslav Hajek <highegg@gmail.com>
parents: 10793
diff changeset
160 elseif (isscalar (file) && isnumeric (file))
1d761a30c3fb support file IDs in dlmwrite
Jaroslav Hajek <highegg@gmail.com>
parents: 10793
diff changeset
161 fid = file;
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Jaroslav Hajek <highegg@gmail.com>
parents: 10793
diff changeset
162 msg = "invalid file number";
1d761a30c3fb support file IDs in dlmwrite
Jaroslav Hajek <highegg@gmail.com>
parents: 10793
diff changeset
163 else
11472
1740012184f9 Use uppercase for variable names in error() strings to match Info documentation. Only m-files done.
Rik <octave@nomad.inbox5.com>
parents: 11471
diff changeset
164 error ("dlmwrite: FILE must be a filename string or numeric FID");
10936
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parents: 10793
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165 endif
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Jaroslav Hajek <highegg@gmail.com>
parents: 10793
diff changeset
166
7580
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David Bateman <dbateman@free.fr>
parents:
diff changeset
167 if (fid < 0)
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David Bateman <dbateman@free.fr>
parents:
diff changeset
168 error (msg);
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David Bateman <dbateman@free.fr>
parents:
diff changeset
169 else
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David Bateman <dbateman@free.fr>
parents:
diff changeset
170 if (r > 0)
7581
e0d7bb35a3ec style fixes
John W. Eaton <jwe@octave.org>
parents: 7580
diff changeset
171 fprintf (fid, "%s",
11471
994e2a93a8e2 Use uppercase 'A' to refer to matrix inputs in m-files.
Rik <octave@nomad.inbox5.com>
parents: 11032
diff changeset
172 repmat ([repmat(delim, 1, c + columns(M)-1), newline], 1, r));
7580
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David Bateman <dbateman@free.fr>
parents:
diff changeset
173 endif
11471
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Rik <octave@nomad.inbox5.com>
parents: 11032
diff changeset
174 if (iscomplex (M))
11032
c9b0a75b02e8 Make all regexp in Octave compatible with both POSIX and PCRE.
Rik <octave@nomad.inbox5.com>
parents: 10940
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175 cprecision = regexprep (precision, '^%([-.0-9])','%+$1');
7580
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parents:
diff changeset
176 template = [precision, cprecision, "i", ...
10549
95c3e38098bf Untabify .m scripts
Rik <code@nomad.inbox5.com>
parents: 9630
diff changeset
177 repmat([delim, precision, cprecision, "i"], 1, ...
11471
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Rik <octave@nomad.inbox5.com>
parents: 11032
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178 columns(M) - 1), newline ];
7580
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David Bateman <dbateman@free.fr>
parents:
diff changeset
179 else
11471
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Rik <octave@nomad.inbox5.com>
parents: 11032
diff changeset
180 template = [precision, repmat([delim, precision], 1, columns(M)-1),...
10549
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Rik <code@nomad.inbox5.com>
parents: 9630
diff changeset
181 newline];
7580
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David Bateman <dbateman@free.fr>
parents:
diff changeset
182 endif
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David Bateman <dbateman@free.fr>
parents:
diff changeset
183 if (c > 0)
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David Bateman <dbateman@free.fr>
parents:
diff changeset
184 template = [repmat(delim, 1, c), template];
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David Bateman <dbateman@free.fr>
parents:
diff changeset
185 endif
11471
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Rik <octave@nomad.inbox5.com>
parents: 11032
diff changeset
186 if (iscomplex (M))
994e2a93a8e2 Use uppercase 'A' to refer to matrix inputs in m-files.
Rik <octave@nomad.inbox5.com>
parents: 11032
diff changeset
187 M = M.';
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Rik <octave@nomad.inbox5.com>
parents: 11032
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188 b = zeros (2*rows(M), columns (M));
994e2a93a8e2 Use uppercase 'A' to refer to matrix inputs in m-files.
Rik <octave@nomad.inbox5.com>
parents: 11032
diff changeset
189 b(1: 2 : end, :) = real (M);
994e2a93a8e2 Use uppercase 'A' to refer to matrix inputs in m-files.
Rik <octave@nomad.inbox5.com>
parents: 11032
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190 b(2: 2 : end, :) = imag (M);
7580
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David Bateman <dbateman@free.fr>
parents:
diff changeset
191 fprintf (fid, template, b);
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David Bateman <dbateman@free.fr>
parents:
diff changeset
192 else
11471
994e2a93a8e2 Use uppercase 'A' to refer to matrix inputs in m-files.
Rik <octave@nomad.inbox5.com>
parents: 11032
diff changeset
193 fprintf (fid, template, M.');
7580
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David Bateman <dbateman@free.fr>
parents:
diff changeset
194 endif
10940
306e40d773a9 don't fclose stream in dlmwrite
Jaroslav Hajek <highegg@gmail.com>
parents: 10936
diff changeset
195 if (! isscalar (file))
306e40d773a9 don't fclose stream in dlmwrite
Jaroslav Hajek <highegg@gmail.com>
parents: 10936
diff changeset
196 fclose (fid);
306e40d773a9 don't fclose stream in dlmwrite
Jaroslav Hajek <highegg@gmail.com>
parents: 10936
diff changeset
197 endif
7580
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David Bateman <dbateman@free.fr>
parents:
diff changeset
198 endif
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David Bateman <dbateman@free.fr>
parents:
diff changeset
199 endfunction
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David Bateman <dbateman@free.fr>
parents:
diff changeset
200
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David Bateman <dbateman@free.fr>
parents:
diff changeset
201 %!test
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David Bateman <dbateman@free.fr>
parents:
diff changeset
202 %! f = tmpnam();
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David Bateman <dbateman@free.fr>
parents:
diff changeset
203 %! dlmwrite(f,[1,2;3,4],'precision','%5.2f','newline','unix','roffset',1,'coffset',1);
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David Bateman <dbateman@free.fr>
parents:
diff changeset
204 %! fid = fopen(f,"rt");
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David Bateman <dbateman@free.fr>
parents:
diff changeset
205 %! f1 = char(fread(fid,Inf,'char')');
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David Bateman <dbateman@free.fr>
parents:
diff changeset
206 %! fclose(fid);
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David Bateman <dbateman@free.fr>
parents:
diff changeset
207 %! dlmwrite(f,[5,6],'precision','%5.2f','newline','unix','coffset',1,'delimiter',',','-append');
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David Bateman <dbateman@free.fr>
parents:
diff changeset
208 %! fid = fopen(f,"rt");
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David Bateman <dbateman@free.fr>
parents:
diff changeset
209 %! f2 = char(fread(fid,Inf,'char')');
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David Bateman <dbateman@free.fr>
parents:
diff changeset
210 %! fclose(fid);
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David Bateman <dbateman@free.fr>
parents:
diff changeset
211 %! unlink(f);
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David Bateman <dbateman@free.fr>
parents:
diff changeset
212 %!
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David Bateman <dbateman@free.fr>
parents:
diff changeset
213 %! assert(f1,",,\n, 1.00, 2.00\n, 3.00, 4.00\n");
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David Bateman <dbateman@free.fr>
parents:
diff changeset
214 %! assert(f2,",,\n, 1.00, 2.00\n, 3.00, 4.00\n, 5.00, 6.00\n");