1 ## Copyright (C) 2012 Rik Wehbring
2 ## Copyright (C) 1996-2012 Kurt Hornik
4 ## This file is part of Octave.
6 ## Octave is free software; you can redistribute it and/or modify it
7 ## under the terms of the GNU General Public License as published by
8 ## the Free Software Foundation; either version 3 of the License, or (at
9 ## your option) any later version.
11 ## Octave is distributed in the hope that it will be useful, but
12 ## WITHOUT ANY WARRANTY; without even the implied warranty of
13 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 ## General Public License for more details.
16 ## You should have received a copy of the GNU General Public License
17 ## along with Octave; see the file COPYING. If not, see
18 ## <http://www.gnu.org/licenses/>.
21 ## @deftypefn {Function File} {} empirical_pdf (@var{x}, @var{data})
22 ## For each element of @var{x}, compute the probability density function
23 ## (PDF) at @var{x} of the empirical distribution obtained from the
24 ## univariate sample @var{data}.
27 ## Author: KH <Kurt.Hornik@wu-wien.ac.at>
28 ## Description: PDF of the empirical distribution
30 function pdf = empirical_pdf (x, data)
36 if (! isvector (data))
37 error ("empirical_pdf: DATA must be a vector");
40 pdf = discrete_pdf (x, data, ones (size (data)));
46 %! x = [-1 0.1 1.1 1.9 3];
48 %! y = [0 0.1 0.1 0.1 0];
49 %!assert(empirical_pdf (x, v), y);
51 %% Test class of input preserved
52 %!assert(empirical_pdf (single(x), v), single (y));
53 %!assert(empirical_pdf (x, single(v)), single (y));
55 %% Test input validation
56 %!error empirical_pdf ()
57 %!error empirical_pdf (1)
58 %!error empirical_pdf (1,2,3)
59 %!error empirical_inv (1, ones(2))