Mercurial > hg > octave-lyh
annotate scripts/general/flipdim.m @ 14872:c2dbdeaa25df
maint: use rows() and columns() to clarify m-files.
* gradient.m, interp1q.m, rat.m, tsearchn.m, image.m, imwrite.m, area.m,
contourc.m, hist.m, isocolors.m, isonormals.m, meshz.m, print.m, __bar__.m,
__go_draw_axes__.m, __interp_cube__.m, __marching_cube__.m, __patch__.m,
__print_parse_opts__.m, __quiver__.m, rose.m, shrinkfaces.m, stairs.m,
surfnorm.m, tetramesh.m, text.m, deconv.m, spline.m, intersect.m, setdiff.m,
setxor.m, union.m, periodogram.m, pcg.m, perms.m: Replace size (x,1) with
rows (x) and size(x,2) with columns(x).
author | Rik <octave@nomad.inbox5.com> |
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date | Tue, 17 Jul 2012 13:34:19 -0700 |
parents | f3d52523cde1 |
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rev | line source |
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maint: update copyright notices for 2012
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1 ## Copyright (C) 2004-2012 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 -*- | |
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21 ## @deftypefn {Function File} {} flipdim (@var{x}) |
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22 ## @deftypefnx {Function File} {} flipdim (@var{x}, @var{dim}) |
5012 | 23 ## Return a copy of @var{x} flipped about the dimension @var{dim}. |
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24 ## @var{dim} defaults to the first non-singleton dimension. |
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25 ## For example: |
5012 | 26 ## |
27 ## @example | |
28 ## @group | |
29 ## flipdim ([1, 2; 3, 4], 2) | |
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30 ## @result{} 2 1 |
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31 ## 4 3 |
5012 | 32 ## @end group |
33 ## @end example | |
5642 | 34 ## @seealso{fliplr, flipud, rot90, rotdim} |
5012 | 35 ## @end deftypefn |
36 | |
9508 | 37 ## Author: David Bateman, Jaroslav Hajek |
5012 | 38 |
39 function y = flipdim (x, dim) | |
40 | |
41 if (nargin != 1 && nargin != 2) | |
6046 | 42 print_usage (); |
5012 | 43 endif |
44 | |
45 nd = ndims (x); | |
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46 sz = size (x); |
5012 | 47 if (nargin == 1) |
48 ## Find the first non-singleton dimension. | |
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49 (dim = find (sz > 1, 1)) || (dim = 1); |
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50 elseif (! (isscalar (dim) && isindex (dim))) |
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51 error ("flipdim: DIM must be a positive integer"); |
5012 | 52 endif |
53 | |
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54 idx(1:max(nd, dim)) = {':'}; |
9508 | 55 idx{dim} = size (x, dim):-1:1; |
5012 | 56 y = x(idx{:}); |
57 | |
58 endfunction | |
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59 |
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60 |
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61 %!assert (flipdim ([1,2;3,4]), flipdim ([1,2 ; 3,4], 1)) |
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62 %!assert (flipdim ([1,2;3,4], 2), [2,1;4,3]) |
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63 %!assert (flipdim ([1,2;3,4], 3), [1,2;3,4]) |
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64 |
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65 ## FIXME -- we need tests for multidimensional arrays. |
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66 |
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67 %!error flipdim () |
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68 %!error flipdim (1, 2, 3) |
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69 |