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1 ## Copyright (C) 1996, 1997, 2002, 2004, 2005, 2006, 2007 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 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 ## -*- texinfo -*- |
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20 ## @deftypefn {Function File} {} isscalar (@var{a}) |
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21 ## Return 1 if @var{a} is a scalar. Otherwise, return 0. |
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22 ## @seealso{size, rows, columns, length, isscalar, ismatrix} |
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23 ## @end deftypefn |
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24 |
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25 ## Author: jwe |
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26 |
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27 function retval = isscalar (x) |
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28 |
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29 if (nargin == 1) |
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30 retval = numel (x) == 1; |
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31 else |
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32 print_usage (); |
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33 endif |
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34 |
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35 endfunction |
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36 |
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37 %!assert(isscalar (1)); |
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38 |
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39 %!assert(!(isscalar ([1, 2]))); |
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40 |
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41 %!assert(!(isscalar ([]))); |
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42 |
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43 %!assert(!(isscalar ([1, 2; 3, 4]))); |
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44 |
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45 %!test |
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46 %! warn_str_to_num = 0; |
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47 %! assert((isscalar ("t"))); |
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48 |
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49 %!assert(!(isscalar ("test"))); |
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50 |
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51 %!assert(!(isscalar (["test"; "ing"]))); |
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52 |
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53 %!test |
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54 %! s.a = 1; |
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55 %! assert((isscalar (s))); |
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56 |
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57 %!error isscalar (); |
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58 |
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59 %!error isscalar (1, 2); |
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60 |
