Mercurial > hg > octave-nkf
annotate scripts/general/flipdim.m @ 9665:1dba57e9d08d
use blas_trans_type for xgemm
| author | Jaroslav Hajek <highegg@gmail.com> |
|---|---|
| date | Sat, 26 Sep 2009 10:41:07 +0200 |
| parents | 1b290ce305fb |
| children | b32a0214a464 |
| rev | line source |
|---|---|
| 7017 | 1 ## Copyright (C) 2004, 2005, 2006, 2007 David Bateman |
| 9508 | 2 ## Copyright (C) 2009 VZLU Prague |
| 5012 | 3 ## |
| 4 ## This file is part of Octave. | |
| 5 ## | |
| 6 ## Octave is free software; you can redistribute it and/or modify it | |
| 7 ## under the terms of the GNU General Public License as published by | |
| 7016 | 8 ## the Free Software Foundation; either version 3 of the License, or (at |
| 9 ## your option) any later version. | |
| 5012 | 10 ## |
| 11 ## Octave is distributed in the hope that it will be useful, but | |
| 12 ## WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 14 ## General Public License for more details. | |
| 15 ## | |
| 16 ## You should have received a copy of the GNU General Public License | |
| 7016 | 17 ## along with Octave; see the file COPYING. If not, see |
| 18 ## <http://www.gnu.org/licenses/>. | |
| 5012 | 19 |
| 20 ## -*- texinfo -*- | |
| 21 ## @deftypefn {Function File} {} flipdim (@var{x}, @var{dim}) | |
| 22 ## Return a copy of @var{x} flipped about the dimension @var{dim}. | |
| 5018 | 23 ## For example |
| 5012 | 24 ## |
| 25 ## @example | |
| 26 ## @group | |
| 27 ## flipdim ([1, 2; 3, 4], 2) | |
| 28 ## @result{} 2 1 | |
| 29 ## 4 3 | |
| 30 ## @end group | |
| 31 ## @end example | |
| 5642 | 32 ## @seealso{fliplr, flipud, rot90, rotdim} |
| 5012 | 33 ## @end deftypefn |
| 34 | |
| 9508 | 35 ## Author: David Bateman, Jaroslav Hajek |
| 5012 | 36 |
| 37 function y = flipdim (x, dim) | |
| 38 | |
| 39 if (nargin != 1 && nargin != 2) | |
| 6046 | 40 print_usage (); |
| 5012 | 41 endif |
| 42 | |
| 43 nd = ndims (x); | |
| 44 if (nargin == 1) | |
| 45 ## Find the first non-singleton dimension. | |
| 9508 | 46 dim = find (size (x) != 1, 1); |
| 47 if (isempty (dim)) | |
| 5012 | 48 dim = 1; |
| 49 endif | |
| 50 else | |
|
9510
1b290ce305fb
add omitted check in flipdim
Jaroslav Hajek <highegg@gmail.com>
parents:
9508
diff
changeset
|
51 if (! (isscalar (dim) && isindex (dim, nd))) |
| 5012 | 52 error ("flipdim: dim must be an integer and valid dimension"); |
| 53 endif | |
| 54 endif | |
| 55 | |
| 9508 | 56 idx(1:nd) = {':'}; |
| 57 idx{dim} = size (x, dim):-1:1; | |
| 5012 | 58 y = x(idx{:}); |
| 59 | |
| 60 endfunction |