Mercurial > octave
view scripts/strings/strjust.m @ 28240:2fb684dc2ec2
axis.m: Implement "fill" option for Matlab compatibility.
* axis.m: Document that "fill" is a synonym for "normal". Place "vis3d" option
in documentation table for modes which affect aspect ratio. Add
strcmpi (opt, "fill") to decode opt and executed the same behavior as "normal".
author | Rik <rik@octave.org> |
---|---|
date | Fri, 24 Apr 2020 13:16:09 -0700 |
parents | bd51beb6205e |
children | 1dd765e54265 0a5b15007766 |
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######################################################################## ## ## Copyright (C) 2000-2020 The Octave Project Developers ## ## See the file COPYRIGHT.md in the top-level directory of this ## distribution or <https://octave.org/copyright/>. ## ## This file is part of Octave. ## ## Octave is free software: you can redistribute it and/or modify it ## under the terms of the GNU General Public License as published by ## the Free Software Foundation, either version 3 of the License, or ## (at your option) any later version. ## ## Octave is distributed in the hope that it will be useful, but ## WITHOUT ANY WARRANTY; without even the implied warranty of ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ## GNU General Public License for more details. ## ## You should have received a copy of the GNU General Public License ## along with Octave; see the file COPYING. If not, see ## <https://www.gnu.org/licenses/>. ## ######################################################################## ## -*- texinfo -*- ## @deftypefn {} {} strjust (@var{s}) ## @deftypefnx {} {} strjust (@var{s}, @var{pos}) ## Return the text, @var{s}, justified according to @var{pos}, which may ## be @qcode{"left"}, @qcode{"center"}, or @qcode{"right"}. ## ## If @var{pos} is omitted it defaults to @qcode{"right"}. ## ## Null characters are replaced by spaces. All other character data are ## treated as non-white space. ## ## Example: ## ## @example ## @group ## strjust (["a"; "ab"; "abc"; "abcd"]) ## @result{} ## " a" ## " ab" ## " abc" ## "abcd" ## @end group ## @end example ## @seealso{deblank, strrep, strtrim, untabify} ## @end deftypefn function y = strjust (s, pos = "right") if (nargin < 1 || nargin > 2) print_usage (); elseif (! ischar (s) || ndims (s) > 2) error ("strjust: S must be a string or 2-D character matrix"); endif if (isempty (s)) y = s; return; endif ## Apparently, Matlab considers nulls to be blanks as well; however, does ## not preserve the nulls, but rather converts them to blanks. That's a ## bit unexpected, but it allows simpler processing, because we can move ## just the nonblank characters. So we'll do the same here. [nr, nc] = size (s); ## Find the indices of all nonblanks. nonbl = s != " " & s != "\0"; [idx, jdx] = find (nonbl); if (strcmpi (pos, "right")) ## We wish to find the maximum column index for each row. Because jdx is ## sorted, we can take advantage of the fact that assignment is processed ## sequentially and for duplicate indices the last value will remain. maxs = repmat (nc, [nr, 1]); maxs(idx) = jdx; shift = nc - maxs; elseif (strcmpi (pos, "left")) ## See above for explanation. mins = ones (nr, 1); mins(flipud (idx(:))) = flipud (jdx(:)); shift = 1 - mins; else ## Use both of the above to achieve centering. mins = ones (nr, 1); mins(flipud (idx(:))) = flipud (jdx(:)); maxs = repmat (nc, [nr, 1]); maxs(idx) = jdx; shift = floor ((nc + 1 - maxs - mins) / 2); endif ## Adjust the column indices. jdx += shift (idx); ## Create a blank matrix and position the nonblank characters. y = repmat (" ", nr, nc); y(sub2ind ([nr, nc], idx, jdx)) = s(nonbl); endfunction %!assert (strjust (char ("a", "ab", "abc", "abcd")), %! [" a";" ab"; " abc"; "abcd"]) %!assert (strjust (char (" a", " ab", "abc", "abcd"), "left"), %! ["a "; "ab "; "abc "; "abcd"]) %!assert (strjust (char ("a", "ab", "abc", "abcd"), "CENTER"), %! [" a "; " ab "; "abc "; "abcd"]) %!assert (strjust (["";""]), "") ## Test input validation %!error <Invalid call to strjust> strjust () %!error <Invalid call to strjust> strjust (["a";"ab"], "center", 1) %!error <S must be a string> strjust (ones (3,3)) %!error <S must be a string> strjust (char (ones (3,3,3)))