Mercurial > octave-nkf
view scripts/general/shift.m @ 19647:e8e3a89fa370
Fix colormap functions when N is not of class double (bug #44070)
* autumn.m, bone.m, cool.m, copper.m, cubehelix.m, gray.m, hsv.m, ocean.m,
rainbow.m, spring.m, summer.m, winter.m: cast N to double since in this
colormap functions, N is used directly used in the operations and ends up
casting colormap to something else. Note that a colormap MUST be of class
double. Also, if N is an integer class, all values in colormap end up 0
or 1. Also simplify code for input checking by declaring default on function
signature line.
* flag.m, gmap40.m, hot.m, jet.m, lines.m, pink.m, prism.m, white.m: simplify
input check like the other colormap functions.
* test/colormaps.tst: add new test file to test all colormaps at once.
* test/Makefile.am: add new test file to build system.
used to create the colormap and if less
author | Carnë Draug <carandraug@octave.org> |
---|---|
date | Fri, 23 Jan 2015 15:37:56 +0000 |
parents | d63878346099 |
children | 4197fc428c7d |
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## Copyright (C) 1995-2013 Kurt Hornik ## ## 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} {} shift (@var{x}, @var{b}) ## @deftypefnx {Function File} {} shift (@var{x}, @var{b}, @var{dim}) ## If @var{x} is a vector, perform a circular shift of length @var{b} of ## the elements of @var{x}. ## ## If @var{x} is a matrix, do the same for each column of @var{x}. ## If the optional @var{dim} argument is given, operate along this ## dimension. ## @end deftypefn ## Author: AW <Andreas.Weingessel@ci.tuwien.ac.at> ## Created: 14 September 1994 ## Adapted-By: jwe function y = shift (x, b, dim) if (nargin != 2 && nargin != 3) print_usage (); endif if (numel (x) < 1) error ("shift: X must not be empty"); elseif (! (isscalar (b) && b == fix (b))) error ("shift: B must be an integer"); endif nd = ndims (x); sz = size (x); if (nargin == 3) if (!(isscalar (dim) && dim == fix (dim)) || !(1 <= dim && dim <= nd)) error ("shift: DIM must be an integer and a valid dimension"); endif else ## Find the first non-singleton dimension. (dim = find (sz > 1, 1)) || (dim = 1); endif d = sz(dim); idx = repmat ({':'}, nd, 1); if (b > 0) b = rem (b, d); idx{dim} = [d-b+1:d, 1:d-b]; elseif (b < 0) b = rem (abs (b), d); idx{dim} = [b+1:d, 1:b]; endif y = x(idx{:}); endfunction %!test %! a = [1, 2, 3]; %! b = [4, 5, 6]; %! c = [7, 8, 9]; %! %! r = [a, b, c]; %! m = [a; b; c]; %! %! assert (shift (r, 0), r); %! assert (shift (r, 3), [c, a, b]); %! assert (shift (r, -6), [c, a, b]); %! assert (shift (r, -3), [b, c, a]); %! assert (shift (m, 1), [c; a; b]); %! assert (shift (m, -2), [c; a; b]); %% Test input validation %!error shift () %!error shift (1, 2, 3, 4) %!error shift ([], 1) %!error shift (ones (2), ones (2)) %!error shift (ones (2), 1.5) %!error shift (1, 1, 1.5) %!error shift (1, 1, 0) %!error shift (1, 1, 3)