Mercurial > octave-nkf
view scripts/specfun/realpow.m @ 20595:c1a6c31ac29a
eliminate more simple uses of error_state
* ov-classdef.cc: Eliminate simple uses of error_state.
author | John W. Eaton <jwe@octave.org> |
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date | Tue, 06 Oct 2015 00:20:02 -0400 |
parents | 4197fc428c7d |
children |
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## Copyright (C) 2008-2015 David Bateman ## ## 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} {} realpow (@var{x}, @var{y}) ## Compute the real-valued, element-by-element power operator. ## ## This is equivalent to @w{@code{@var{x} .^ @var{y}}}, except that ## @code{realpow} reports an error if any return value is complex. ## @seealso{power, reallog, realsqrt} ## @end deftypefn function z = realpow (x, y) if (nargin != 2) print_usage (); endif z = x .^ y; if (iscomplex (z)) error ("realpow: produced complex result"); endif endfunction %!assert (realpow (1:10, 0.5:0.5:5), power (1:10, 0.5:0.5:5)) %!assert (realpow (1:10, 0.5:0.5:5), [1:10] .^ [0.5:0.5:5]) %!test %! x = rand (10, 10); %! y = randn (10, 10); %! assert (x.^y, realpow (x,y)); %!assert (realpow (1i,2), -1) %!error realpow () %!error realpow (1) %!error realpow (1,2,3) %!error <produced complex result> realpow (-1, 1/2)