|
7017
|
1 ## Copyright (C) 2005, 2006, 2007 John W. Eaton |
|
5411
|
2 ## |
|
|
3 ## This file is part of Octave. |
|
|
4 ## |
|
|
5 ## Octave is free software; you can redistribute it and/or modify it |
|
|
6 ## under the terms of the GNU General Public License as published by |
|
7016
|
7 ## the Free Software Foundation; either version 3 of the License, or (at |
|
|
8 ## your option) any later version. |
|
5411
|
9 ## |
|
|
10 ## Octave is distributed in the hope that it will be useful, but |
|
|
11 ## WITHOUT ANY WARRANTY; without even the implied warranty of |
|
|
12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
|
|
13 ## General Public License for more details. |
|
|
14 ## |
|
|
15 ## You should have received a copy of the GNU General Public License |
|
7016
|
16 ## along with Octave; see the file COPYING. If not, see |
|
|
17 ## <http://www.gnu.org/licenses/>. |
|
5411
|
18 |
|
|
19 ## -*- texinfo -*- |
|
5693
|
20 ## @deftypefn {Function File} {} weibull_pdf (@var{x}, @var{shape}, @var{scale}) |
|
5411
|
21 ## Compute the probability density function (PDF) at @var{x} of the |
|
5693
|
22 ## Weibull distribution with shape parameter @var{scale} and scale |
|
|
23 ## parameter @var{shape} which is given by |
|
5411
|
24 ## |
|
|
25 ## @example |
|
5693
|
26 ## scale * shape^(-scale) * x^(scale-1) * exp(-(x/shape)^scale) |
|
5411
|
27 ## @end example |
|
|
28 ## |
|
|
29 ## @noindent |
|
|
30 ## for @var{x} > 0. |
|
|
31 ## @end deftypefn |
|
|
32 |
|
|
33 function pdf = weibull_pdf (varargin) |
|
|
34 |
|
5693
|
35 if (nargin == 2) |
|
|
36 varargin{3} = varargin{2}; |
|
|
37 varargin{2} = 1; |
|
|
38 elseif (nargin > 2) |
|
|
39 tmp = varargin{3}; |
|
|
40 varargin{3} = varargin{2}; |
|
|
41 varargin{2} = tmp; |
|
|
42 endif |
|
|
43 |
|
|
44 pdf = wblpdf (varargin{:}); |
|
5411
|
45 |
|
|
46 endfunction |
