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1 ## Copyright (C) 1996, 1997 John W. Eaton |
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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 2, or (at your option) |
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8 ## 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, write to the Free |
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17 ## Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
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18 ## 02111-1307, USA. |
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19 |
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20 ## usage: union(a,b) |
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21 ## |
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22 ## Returns the union of sets a and b. |
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23 ## |
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24 ## See - create_set, intersection, complement |
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25 |
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26 ## Author: jwe |
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27 |
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28 function y = union(a,b) |
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29 |
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30 if (nargin != 2) |
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31 usage ("union(a,b)"); |
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32 endif |
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33 |
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34 if(isempty(a)) |
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35 y = create_set(b); |
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36 elseif(isempty(b)) |
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37 y = create_set(a); |
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38 else |
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39 [nra, nca] = size(a); |
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40 a = reshape(a,1,nra*nca); |
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41 [nrb, ncb] = size(b); |
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42 b = reshape(b,1,nrb*ncb); |
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43 y = create_set([a, b]); |
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44 endif |
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45 |
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46 endfunction |
