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[project @ 2005-10-20 20:56:59 by jwe]
author jwe
date Thu, 20 Oct 2005 20:56:59 +0000
parents 04fa51cb7e90
children 61d6cebd243b
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1 ## Copyright (C) 2005 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, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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18 ## 02110-1301, USA.
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19
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20 ## -*- texinfo -*-
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21 ## @deftypefn {Function File} {} unidrnd (@var{mx});
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22 ## @deftypefn {Function File} {} unidrnd (@var{mx}, @var{v});
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23 ## @deftypefn {Function File} {} unidrnd (@var{mx}, @var{m}, @var{n}, @dots{});
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24 ## Return random values from discrete uniform distribution, with maximum
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25 ## value(s) given by the integer @var{mx}, which may be a scalar or
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26 ## multidimensional array.
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27 ##
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28 ## If @var{mx} is a scalar, the size of the result is specified by
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29 ## the vector @var{v}, or by the optional arguments @var{m}, @var{n},
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30 ## @dots{}. Otherwise, the size of the result is the same as the size
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31 ## of @var{mx}.
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32 ## @end deftypefn
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33
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34 ## Author: jwe
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35
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36 function retval = unidrnd (n, varargin)
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37 if (nargin == 1)
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38 dims = size (n);
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39 elseif (nargin == 2)
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40 if (rows (varargin{1}) == 1 && columns (varargin{1}) > 1)
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41 dims = varargin{1};
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42 else
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43 error ("unidrnd: invalid dimension vector");
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44 endif
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45 elseif (nargin > 2)
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46 for i = 1:nargin-1
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47 if (! isscalar (varargin{i}))
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48 error ("unidrnd: expecting scalar dimensions");
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49 endif
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50 endfor
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51 dims = [varargin{:}];
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52 else
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53 error ("unidrnd (n, ...)");
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54 endif
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55 if (isscalar (n)
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56 || (length (size (n)) == length (dims) && all (size (n) == dims)))
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57 retval = ceil (rand (dims) .* n);
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58 else
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59 error ("unidrnd: dimension mismatch");
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60 endif
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61 endfunction