Mercurial > octave-nkf
view scripts/specfun/lcm.m @ 19554:9f7a2d75ce1f
* NEWS: Mention new audio functions.
author | John W. Eaton <jwe@octave.org> |
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date | Fri, 02 Jan 2015 16:39:29 -0500 |
parents | c5a0b995b996 |
children | 4197fc428c7d |
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## Copyright (C) 1994-2013 John W. Eaton ## ## 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 {Mapping Function} {} lcm (@var{x}, @var{y}) ## @deftypefnx {Mapping Function} {} lcm (@var{x}, @var{y}, @dots{}) ## Compute the least common multiple of @var{x} and @var{y}, or of the list of ## all arguments. ## ## All elements must be numeric and of the same size or scalar. ## @seealso{factor, gcd, isprime} ## @end deftypefn ## Author: KH <Kurt.Hornik@wu-wien.ac.at> ## Created: 16 September 1994 ## Adapted-By: jwe function l = lcm (varargin) if (nargin < 2) print_usage (); endif if (common_size (varargin{:}) != 0) error ("lcm: all args must be the same size or scalar"); elseif (! all (cellfun ("isnumeric", varargin))) error ("lcm: all arguments must be numeric"); endif l = varargin{1}; for i = 2:nargin x = varargin{i}; msk = (l == 0 & x == 0); l .*= x ./ gcd (l, x); l(msk) = 0; endfor endfunction %!assert (lcm (3, 5, 7, 15), 105) %!error lcm () %!error lcm (1) %!error <same size or scalar> lcm ([1 2], [1 2 3]) %!error <arguments must be numeric> lcm ([1 2], {1 2})