Mercurial > hg > octave-nkf
annotate scripts/sparse/spy.m @ 20526:d8992a16643c
doc: Clean up m-files which generate images for Manual.
* geometryimages.m, interpimages.m, plotimages.m, sparseimages.m,
splineimages.m: Use the same style throughout the mi-files.
Obey Octave coding conventions.
author | Rik <rik@octave.org> |
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date | Thu, 09 Jul 2015 21:38:57 -0700 |
parents | df437a52bcaf |
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rev | line source |
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maint: Update copyright notices for 2015.
John W. Eaton <jwe@octave.org>
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1 ## Copyright (C) 1998-2015 Andy Adler |
7016 | 2 ## |
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. | |
5164 | 9 ## |
7016 | 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 -*- | |
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20 ## @deftypefn {Function File} {} spy (@var{x}) |
6607 | 21 ## @deftypefnx {Function File} {} spy (@dots{}, @var{markersize}) |
8507 | 22 ## @deftypefnx {Function File} {} spy (@dots{}, @var{line_spec}) |
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23 ## Plot the sparsity pattern of the sparse matrix @var{x}. |
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24 ## |
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25 ## If the argument @var{markersize} is given as a scalar value, it is used to |
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26 ## determine the point size in the plot. |
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27 ## |
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28 ## If the string @var{line_spec} is given it is passed to @code{plot} and |
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29 ## determines the appearance of the plot. |
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30 ## @seealso{plot, gplot} |
5164 | 31 ## @end deftypefn |
32 | |
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all script files: untabify and strip trailing whitespace
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33 function spy (x, varargin) |
6607 | 34 |
7125 | 35 if (nargin < 1) |
36 print_usage (); | |
37 endif | |
38 | |
6607 | 39 markersize = NaN; |
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spy.m: Use nnz, not numel, to avoid overflowing octave_idx_type (bug #42116).
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40 if (nnz (x) < 1000) |
8507 | 41 line_spec = "*"; |
6607 | 42 else |
8507 | 43 line_spec = "."; |
6607 | 44 endif |
8507 | 45 for i = 1:length (varargin) |
46 if (ischar (varargin{i})) | |
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47 if (length (varargin{i}) == 1) |
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48 line_spec = [line_spec, varargin{i}]; |
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49 else |
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50 line_spec = varargin{i}; |
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51 endif |
6607 | 52 elseif (isscalar (varargin{i})) |
53 markersize = varargin{i}; | |
54 else | |
55 error ("spy: expected markersize or linespec"); | |
56 endif | |
57 endfor | |
6446 | 58 |
8507 | 59 [i, j, s] = find (x); |
60 [m, n] = size (x); | |
5164 | 61 |
6607 | 62 if (isnan (markersize)) |
8507 | 63 plot (j, i, line_spec); |
6446 | 64 else |
8507 | 65 plot (j, i, line_spec, "markersize", markersize); |
6446 | 66 endif |
5164 | 67 |
6674 | 68 axis ([0, n+1, 0, m+1], "ij"); |
5164 | 69 |
70 endfunction | |
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codesprint: Add demo block for spy.m
Rik <octave@nomad.inbox5.com>
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71 |
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72 |
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73 %!demo |
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74 %! clf; |
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75 %! spy (sprand (10,10, 0.2)); |
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76 |
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77 ## Mark graphical function as tested by demo block |
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78 %!assert (1) |
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79 |