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meshgrid.m: Overhaul function. * scripts/plot/meshgrid.m: Redo docstring and add example and comparison to ndgrid. Put input validation first. Add %!error blocks for input validation.
author Rik <rik@octave.org>
date Wed, 25 Sep 2013 12:37:53 -0700
parents 1af8d21608b7
children
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72c96de7a403 maint: update copyright notices for 2012
John W. Eaton <jwe@octave.org>
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1 ## Copyright (C) 2008-2012 Jaroslav Hajek
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2 ##
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3 ## This file is part of Octave.
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4 ##
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5 ## Octave is free software; you can redistribute it and/or modify it
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6 ## under the terms of the GNU General Public License as published by
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7 ## the Free Software Foundation; either version 3 of the License, or (at
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8 ## your option) any later version.
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9 ##
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10 ## Octave is distributed in the hope that it will be useful, but
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 ## General Public License for more details.
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14 ##
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15 ## You should have received a copy of the GNU General Public License
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16 ## along with Octave; see the file COPYING. If not, see
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17 ## <http://www.gnu.org/licenses/>.
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18
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19 %!test
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20 %! a = 1:3; a(:) = []; assert (size (a), [0, 0])
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21 %!test
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22 %! a = 1:3; a(1:3) = []; assert (size (a), [1, 0])
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23 %!test
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24 %! a = (1:3).'; a(1:3) = []; assert (size (a), [0, 1])
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25 %!test
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26 %! a = ones (3); a(:,:) = []; assert (size (a), [0, 3])
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27 %!test
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28 %! a = ones (3); a(1:3,:) = []; assert (size (a), [0, 3])
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29 %!test
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30 %! a = ones (3); a(:,1:3) = []; assert (size (a), [3, 0])
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31 %!test
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32 %! a = ones (3); fail ("a(1:2,1:2) = []", ".*");
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33 %!test
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34 %! a = ones (3); fail ("a(1:3,1:3) = []", ".*");
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36 ## null strings should delete. [,] and [;] should delete.
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37 %!test
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38 %! a = ones (3); a(1:2,:) = [,]; assert (size (a), [1,3])
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39 %!test
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40 %! a = ones (3); a(1:2,:) = [;]; assert (size (a), [1,3])
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41 %!test
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42 %! a = ones (3); a(1:2,:) = ''; assert (size (a), [1,3])
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43 %!test
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44 %! a = ones (3); a(1:2,:) = ""; assert (size (a), [1,3])
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46 ## null matrix stored anywhere should lose its special status
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47 %!test
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48 %! a = ones (3); b = []; fail ("a(:,1:3) = b", ".")
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49 %!test
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50 %! a = ones (3); b{1} = []; fail ("a(:,1:3) = b{1}", ".")
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51 %!test
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52 %! a = ones (3); b.x = []; fail ("a(:,1:3) = b.x", ".")
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54 ## filtering a null matrix through a function should not delete
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55 %!test
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56 %! a = ones (3); fail ("a(:,1:3) = double ([])")
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58 ## subsasgn should work the same way
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59 %!test
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60 %! a = ones (3); a = subsasgn (a, substruct ('()', {':',1:2}), []); assert (size (a), [3,1])
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61 %!test
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62 %! a = ones (3); b = []; fail ("subsasgn (a, substruct ('()', {':',1:2}), b)", ".")
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