Mercurial > hg > octave-nkf
annotate scripts/sparse/spconvert.m @ 20511:eca5aa3225f4
imshow.m: Add support for 'parent' property (bug #45473).
* imshow.m: Add cell variable prop_val_args{:} when calling image or imagesc.
Populate prop_val_args with {"parent", hparent} when "parent" argument given
to imshow. Remove code commented out in 2015/05/1 which has not caused any
problems. Add warning that arguments "border" and "reduce" are not supported.
author | Rik <rik@octave.org> |
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date | Sun, 05 Jul 2015 13:55:56 -0700 |
parents | df437a52bcaf |
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1 ## Copyright (C) 2004-2015 David Bateman and Andy Adler |
5164 | 2 ## |
7016 | 3 ## This file is part of Octave. |
5164 | 4 ## |
7016 | 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. | |
9 ## | |
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. | |
5164 | 14 ## |
15 ## You should have received a copy of the GNU General Public License | |
7016 | 16 ## along with Octave; see the file COPYING. If not, see |
17 ## <http://www.gnu.org/licenses/>. | |
5164 | 18 |
19 ## -*- texinfo -*- | |
20 ## @deftypefn {Function File} {@var{x} =} spconvert (@var{m}) | |
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21 ## Convert a simple sparse matrix format easily generated by other programs |
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22 ## into Octave's internal sparse format. |
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23 ## |
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24 ## The input @var{m} is either a 3 or 4 column real matrix, containing the |
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25 ## row, column, real, and imaginary parts of the elements of the sparse |
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26 ## matrix. An element with a zero real and imaginary part can be used to |
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27 ## force a particular matrix size. |
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28 ## @seealso{sparse} |
5164 | 29 ## @end deftypefn |
30 | |
31 function s = spconvert (m) | |
32 | |
6498 | 33 if (issparse (m)) |
5164 | 34 s = m; |
35 else | |
6498 | 36 sz = size (m); |
37 if (nargin != 1 || ! ismatrix (m) || ! isreal (m) | |
10549 | 38 || length (sz) != 2 || (sz(2) != 3 && sz(2) != 4)) |
6498 | 39 error ("spconvert: argument must be sparse or real matrix with 3 or 4 columns"); |
5164 | 40 elseif (sz(2) == 3) |
41 s = sparse (m(:,1), m(:,2), m(:,3)); | |
42 else | |
43 s = sparse (m(:,1), m(:,2), m(:,3) + 1i*m(:,4)); | |
44 endif | |
45 endif | |
6498 | 46 |
5164 | 47 endfunction |
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48 |
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49 |
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50 %!test |
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51 %! i = [1; 3; 5]; |
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52 %! j = [2; 4; 6]; |
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53 %! v = [7; 8; 9]; |
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54 %! s = spconvert ([i, j, v]); |
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55 %! assert (issparse (s)); |
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56 %! [fi, fj, fv] = find (s); |
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57 %! assert (isequal (i, fi) && isequal (j, fj) && isequal (v, fv)); |
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58 %! s = spconvert ([i, j, v, j]); |
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59 %! [fi, fj, fv] = find (s); |
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60 %! assert (isequal (i, fi) && isequal (j, fj) && isequal (complex (v, j), fv)); |
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61 %! assert (size (spconvert ([1, 1, 3; 5, 15, 0])), [5, 15]); |
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62 |
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63 ## Test input validation |
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64 %!error spconvert () |
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65 %!error spconvert (1, 2) |
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66 %!error spconvert ({[1 2 3]}) |
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67 %!error spconvert ([1 2]) |
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68 %!error spconvert ([1 2 3i]) |
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69 %!error spconvert ([1 2 3 4 5]) |
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