1 ## Copyright (C) 1993-2012 John W. Eaton
3 ## This file is part of Octave.
5 ## Octave is free software; you can redistribute it and/or modify it
6 ## under the terms of the GNU General Public License as published by
7 ## the Free Software Foundation; either version 3 of the License, or (at
8 ## your option) any later version.
10 ## Octave is distributed in the hope that it will be useful, but
11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 ## General Public License for more details.
15 ## You should have received a copy of the GNU General Public License
16 ## along with Octave; see the file COPYING. If not, see
17 ## <http://www.gnu.org/licenses/>.
20 ## @deftypefn {Function File} {} flipud (@var{x})
21 ## Return a copy of @var{x} with the order of the rows reversed. In
22 ## other words, @var{x} is flipped upside-down about a horizontal axis. For
27 ## flipud ([1, 2; 3, 4])
33 ## Note that @code{flipud} only works with 2-D arrays. To flip N-D arrays
34 ## use @code{flipdim} instead.
35 ## @seealso{fliplr, flipdim, rot90, rotdim}
40 function y = flipud (x)
47 error ("flipud: Only works with 2-d arrays");
55 %!assert((flipud ([1, 2; 3, 4]) == [3, 4; 1, 2]
56 %! && flipud ([1, 2; 3, 4; 5, 6]) == [5, 6; 3, 4; 1, 2]
57 %! && flipud ([1, 2, 3; 4, 5, 6]) == [4, 5, 6; 1, 2, 3]));
61 %!error flipud (1, 2);