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2303
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1 ### Copyright (C) 1996 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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559
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20 function y = create_set(x) |
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21 |
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22 ## usage: create_set(x) |
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23 ## |
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24 ## Returns the unique elements of x, sorted in ascending order. |
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25 ## |
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26 ## See - union, intersection, complement |
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27 |
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28 if ( nargin != 1) |
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904
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29 usage ("create_set(x)"); |
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559
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30 endif |
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31 |
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32 if(isempty(x)) |
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33 y = []; |
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34 else |
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35 [nrx, ncx] = size(x); |
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36 nelx = nrx*ncx; |
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37 x = reshape(x,1,nelx); |
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38 y = zeros(1,nelx); |
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39 |
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40 x = sort(x); |
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41 cur_val = y(1) = x(1); |
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42 yindex = xindex = 2; |
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43 |
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44 while (xindex <= nelx) |
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45 if(cur_val != x(xindex)) |
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46 cur_val = x(xindex); |
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47 y(yindex++) = cur_val; |
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48 endif |
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49 xindex++; |
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50 endwhile |
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51 y = y(1:(yindex-1)); |
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52 endif |
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53 |
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54 endfunction |
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55 |
