Mercurial > octave
view scripts/strings/isstring.m @ 28236:5bb1c0cbb27e
dec2bin.m: Allow negative number inputs (bug #58147).
* dec2bin.m: Document that negative numbers are converted according to 2's
complement convention. Add example to documentation of converting a
negative number. Add algorithm to detect negative inputs and add the
appropriate offset for 2's complement notation. Add BIST tests.
author | Nicholas R. Jankowski <jankowskin@asme.org> |
---|---|
date | Wed, 22 Apr 2020 15:53:51 -0700 |
parents | bd51beb6205e |
children | d8318c12d903 0a5b15007766 |
line wrap: on
line source
######################################################################## ## ## Copyright (C) 2017-2020 The Octave Project Developers ## ## See the file COPYRIGHT.md in the top-level directory of this ## distribution or <https://octave.org/copyright/>. ## ## 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 {} {} isstring (@var{s}) ## Return true if @var{s} is a string array. ## ## A string array is a data type that stores strings (row vectors of ## characters) at each element in the array. It is distinct from character ## arrays which are N-dimensional arrays where each element is a single 1x1 ## character. It is also distinct from cell arrays of strings which store ## strings at each element, but use cell indexing @samp{@{@}} to access ## elements rather than string arrays which use ordinary array indexing ## @samp{()}. ## ## Programming Note: Octave does not yet implement string arrays so this ## function will always return false. ## @seealso{ischar, iscellstr, isfloat, isinteger, islogical, isnumeric, isa} ## @end deftypefn function retval = isstring (s) if (nargin != 1) print_usage (); endif retval = false; endfunction %!assert (isstring ([]), false) %!assert (isstring (1), false) %!assert (isstring ('a'), false) ## FIXME: when string arrays are implemented, this should return true. #%!assert (isstring ("b"), true) %!assert (isstring ({'a'}), false) %!assert (isstring ({"b"}), false) %!error isstring () %!error isstring ("a", "b")