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annotate scripts/sparse/colperm.m @ 14872:c2dbdeaa25df

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maint: use rows() and columns() to clarify m-files. * gradient.m, interp1q.m, rat.m, tsearchn.m, image.m, imwrite.m, area.m, contourc.m, hist.m, isocolors.m, isonormals.m, meshz.m, print.m, __bar__.m, __go_draw_axes__.m, __interp_cube__.m, __marching_cube__.m, __patch__.m, __print_parse_opts__.m, __quiver__.m, rose.m, shrinkfaces.m, stairs.m, surfnorm.m, tetramesh.m, text.m, deconv.m, spline.m, intersect.m, setdiff.m, setxor.m, union.m, periodogram.m, pcg.m, perms.m: Replace size (x,1) with rows (x) and size(x,2) with columns(x).
author Rik <octave@nomad.inbox5.com>
date Tue, 17 Jul 2012 13:34:19 -0700
parents 72c96de7a403
children 1c89599167a6
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72c96de7a403 maint: update copyright notices for 2012
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1 ## Copyright (C) 2004-2012 David Bateman and Andy Adler
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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{p} =} colperm (@var{s})
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21 ## Return the column permutations such that the columns of
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22 ## @code{@var{s} (:, @var{p})} are ordered in terms of increase number
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23 ## of non-zero elements. If @var{s} is symmetric, then @var{p} is chosen
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24 ## such that @code{@var{s} (@var{p}, @var{p})} orders the rows and
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25 ## columns with increasing number of non zeros elements.
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26 ## @end deftypefn
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27
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28 function p = colperm (s)
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29
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30 if (nargin != 1)
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31 print_usage ();
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32 endif
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33
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34 [i, j] = find (s);
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35 idx = find (diff ([j; Inf]) != 0);
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36 [dummy, p] = sort (idx - [0; idx(1:(end-1))]);
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37 endfunction