Mercurial > octave
view scripts/sparse/spones.m @ 25054:6652d3823428 stable
maint: Update copyright dates in all source files.
author | John W. Eaton <jwe@octave.org> |
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date | Fri, 30 Mar 2018 09:19:05 -0400 |
parents | 194eb4bd202b |
children | 00f796120a6d |
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## Copyright (C) 2004-2018 David Bateman and Andy Adler ## ## 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 {} {@var{r} =} spones (@var{S}) ## Replace the nonzero entries of @var{S} with ones. ## ## This creates a sparse matrix with the same structure as @var{S}. ## @seealso{sparse, sprand, sprandn, sprandsym, spfun, spy} ## @end deftypefn function r = spones (S) if (nargin != 1) print_usage (); endif [i, j, v] = find (S); [m, n] = size (S); r = sparse (i, j, 1, m, n); endfunction %!assert (issparse (spones ([1,2;3,0]))) %!assert (spones ([1,2;3,0]), sparse ([1,1;1,0])) %!assert (spones (sparse ([1,2;3,0])), sparse ([1,1;1,0]))