Mercurial > octave-nkf
view scripts/sparse/nonzeros.m @ 20643:d6d04088ac9e
nbininv.m: Increase speed (85X) and accuracy of function (bug #34363).
* nbininv.m: Call new function scalar_nbininv to calculate nbininv for scalar.
If there are still uncalculated values then call bin_search_nbininv. Call
bin_search_nbininv directly for vectors. Add more BIST tests.
* nbininv.m (scalar_binoinv): New subfunction to calculate nbininv for scalar x.
Stops when x > 1000.
* nbininv.m (bin_search_nbininv): New subfunction to do binary search for nbininv.
author | Lachlan Andrew <lachlanbis@gmail.com> |
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date | Sun, 11 Oct 2015 20:33:37 -0700 |
parents | 4197fc428c7d |
children |
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## Copyright (C) 2004-2015 Paul Kienzle ## ## 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 ## <http://www.gnu.org/licenses/>. ## -*- texinfo -*- ## @deftypefn {Function File} {} nonzeros (@var{s}) ## Return a vector of the nonzero values of the sparse matrix @var{s}. ## @seealso{find, nnz} ## @end deftypefn function t = nonzeros (s) if (nargin != 1) print_usage (); endif [~, ~, t] = find (s); t = t(:); endfunction %!assert (nonzeros ([1,2;3,0]), [1;3;2]) %!assert (nonzeros ([1,2,3,0]), [1;2;3]) %!assert (nonzeros (sparse ([1,2;3,0])), [1;3;2]) %!assert (nonzeros (sparse ([1,2,3,0])), [1;2;3])