annotate scripts/strings/ostrsplit.m @ 20164:df437a52bcaf stable

doc: Update more docstrings to have one sentence summary as first line. Reviewed miscellaneous, sparse, strings in scripts directory. * scripts/miscellaneous/bzip2.m, scripts/miscellaneous/citation.m, scripts/miscellaneous/compare_versions.m, scripts/miscellaneous/computer.m, scripts/miscellaneous/debug.m, scripts/miscellaneous/dir.m, scripts/miscellaneous/edit.m, scripts/miscellaneous/error_ids.m, scripts/miscellaneous/fileattrib.m, scripts/miscellaneous/fullfile.m, scripts/miscellaneous/genvarname.m, scripts/miscellaneous/gzip.m, scripts/miscellaneous/mkoctfile.m, scripts/miscellaneous/news.m, scripts/miscellaneous/open.m, scripts/miscellaneous/parseparams.m, scripts/miscellaneous/recycle.m, scripts/miscellaneous/run.m, scripts/miscellaneous/swapbytes.m, scripts/miscellaneous/tar.m, scripts/miscellaneous/tmpnam.m, scripts/miscellaneous/unpack.m, scripts/miscellaneous/what.m, scripts/sparse/bicg.m, scripts/sparse/bicgstab.m, scripts/sparse/cgs.m, scripts/sparse/colperm.m, scripts/sparse/eigs.m, scripts/sparse/etreeplot.m, scripts/sparse/gmres.m, scripts/sparse/gplot.m, scripts/sparse/ichol.m, scripts/sparse/ilu.m, scripts/sparse/pcg.m, scripts/sparse/pcr.m, scripts/sparse/qmr.m, scripts/sparse/spaugment.m, scripts/sparse/spconvert.m, scripts/sparse/spdiags.m, scripts/sparse/spfun.m, scripts/sparse/spones.m, scripts/sparse/sprandsym.m, scripts/sparse/spstats.m, scripts/sparse/spy.m, scripts/sparse/svds.m, scripts/sparse/treelayout.m, scripts/sparse/treeplot.m, scripts/strings/base2dec.m, scripts/strings/bin2dec.m, scripts/strings/blanks.m, scripts/strings/cstrcat.m, scripts/strings/deblank.m, scripts/strings/dec2base.m, scripts/strings/dec2bin.m, scripts/strings/dec2hex.m, scripts/strings/findstr.m, scripts/strings/hex2dec.m, scripts/strings/index.m, scripts/strings/isletter.m, scripts/strings/isstrprop.m, scripts/strings/mat2str.m, scripts/strings/ostrsplit.m, scripts/strings/regexptranslate.m, scripts/strings/rindex.m, scripts/strings/str2num.m, scripts/strings/strcat.m, scripts/strings/strchr.m, scripts/strings/strjoin.m, scripts/strings/strjust.m, scripts/strings/strmatch.m, scripts/strings/strsplit.m, scripts/strings/strtok.m, scripts/strings/strtrim.m, scripts/strings/strtrunc.m, scripts/strings/substr.m, scripts/strings/untabify.m, scripts/time/datenum.m: Update more docstrings to have one sentence summary as first line.
author Rik <rik@octave.org>
date Mon, 04 May 2015 14:22:02 -0700
parents 9fc020886ae9
children
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rev   line source
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4197fc428c7d maint: Update copyright notices for 2015.
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1 ## Copyright (C) 2009-2015 Jaroslav Hajek
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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} {[@var{cstr}] =} ostrsplit (@var{s}, @var{sep})
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21 ## @deftypefnx {Function File} {[@var{cstr}] =} ostrsplit (@var{s}, @var{sep}, @var{strip_empty})
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22 ## Split the string @var{s} using one or more separators @var{sep} and return
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23 ## a cell array of strings.
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24 ##
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25 ## Consecutive separators and separators at boundaries result in empty
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26 ## strings, unless @var{strip_empty} is true. The default value of
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27 ## @var{strip_empty} is false.
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28 ##
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29 ## 2-D character arrays are split at separators and at the original column
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30 ## boundaries.
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31 ##
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32 ## Example:
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33 ##
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34 ## @example
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35 ## @group
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36 ## ostrsplit ("a,b,c", ",")
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37 ## @result{}
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38 ## @{
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39 ## [1,1] = a
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40 ## [1,2] = b
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41 ## [1,3] = c
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42 ## @}
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43 ##
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44 ## ostrsplit (["a,b" ; "cde"], ",")
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45 ## @result{}
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46 ## @{
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47 ## [1,1] = a
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48 ## [1,2] = b
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49 ## [1,3] = cde
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50 ## @}
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51 ## @end group
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52 ## @end example
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53 ## @seealso{strsplit, strtok}
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54 ## @end deftypefn
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55
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56 function cstr = ostrsplit (s, sep, strip_empty = false)
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57
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58 if (nargin < 2 || nargin > 3)
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59 print_usage ();
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60 elseif (! ischar (s) || ! ischar (sep))
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61 error ("ostrsplit: S and SEP must be string values");
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62 elseif (! isscalar (strip_empty))
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63 error ("ostrsplit: STRIP_EMPTY must be a scalar value");
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64 endif
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65
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66 if (isempty (s))
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67 cstr = cell (size (s));
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68 else
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69 if (rows (s) > 1)
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70 ## For 2-D arrays, add separator character at line boundaries
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71 ## and transform to single string
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72 s(:, end+1) = sep(1);
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73 s = reshape (s.', 1, numel (s));
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74 s(end) = [];
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75 endif
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76
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77 ## Split s according to delimiter
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78 if (isscalar (sep))
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79 ## Single separator
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80 idx = find (s == sep);
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81 else
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82 ## Multiple separators
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83 idx = strchr (s, sep);
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84 endif
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85
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86 ## Get substring lengths.
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87 if (isempty (idx))
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88 strlens = length (s);
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89 else
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90 strlens = [idx(1)-1, diff(idx)-1, numel(s)-idx(end)];
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91 endif
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92 ## Remove separators.
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93 s(idx) = [];
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94 if (strip_empty)
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95 ## Omit zero lengths.
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96 strlens = strlens(strlens != 0);
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97 endif
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98
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99 ## Convert!
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100 cstr = mat2cell (s, 1, strlens);
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101 endif
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102
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103 endfunction
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104
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105
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106 %!assert (ostrsplit ("road to hell", " "), {"road", "to", "hell"})
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107 %!assert (ostrsplit ("road to^hell", " ^"), {"road", "to", "hell"})
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108 %!assert (ostrsplit ("road to--hell", " -", true), {"road", "to", "hell"})
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109 %!assert (ostrsplit (["a,bc";",de"], ","), {"a", "bc", char(ones(1,0)), "de "})
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110 %!assert (ostrsplit (["a,bc";",de"], ",", true), {"a", "bc", "de "})
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111 %!assert (ostrsplit (["a,bc";",de"], ", ", true), {"a", "bc", "de"})
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112
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113 ## Test input validation
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114 %!error ostrsplit ()
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115 %!error ostrsplit ("abc")
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116 %!error ostrsplit ("abc", "b", true, 4)
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117 %!error <S and SEP must be string values> ostrsplit (123, "b")
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118 %!error <S and SEP must be string values> ostrsplit ("abc", 1)
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119 %!error <STRIP_EMPTY must be a scalar value> ostrsplit ("abc", "def", ones (3,3))
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120