|
3200
|
1 ## Copyright (C) 1995, 1996, 1997 Kurt Hornik |
|
3426
|
2 ## |
|
3922
|
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 |
|
3200
|
7 ## the Free Software Foundation; either version 2, or (at your option) |
|
|
8 ## any later version. |
|
3426
|
9 ## |
|
3922
|
10 ## Octave is distributed in the hope that it will be useful, but |
|
3200
|
11 ## WITHOUT ANY WARRANTY; without even the implied warranty of |
|
|
12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
|
3426
|
13 ## General Public License for more details. |
|
|
14 ## |
|
3200
|
15 ## You should have received a copy of the GNU General Public License |
|
3922
|
16 ## along with Octave; see the file COPYING. If not, write to the Free |
|
5307
|
17 ## Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
|
|
18 ## 02110-1301, USA. |
|
3200
|
19 |
|
3453
|
20 ## -*- texinfo -*- |
|
|
21 ## @deftypefn {Function File} {} logit (@var{p}) |
|
6754
|
22 ## For each component of @var{p}, return the logit of @var{p} defined as |
|
|
23 ## @iftex |
|
|
24 ## @tex |
|
|
25 ## $$ |
|
|
26 ## {\rm logit}(p) = \log\Big({p \over 1-p}\Big) |
|
|
27 ## $$ |
|
|
28 ## @end tex |
|
|
29 ## @ifnottex |
|
|
30 ## @example |
|
|
31 ## logit(@var{p}) = log (@var{p} / (1-@var{p})) |
|
|
32 ## @end example |
|
|
33 ## @end ifnottex |
|
3453
|
34 ## @end deftypefn |
|
3426
|
35 |
|
5428
|
36 ## Author: KH <Kurt.Hornik@wu-wien.ac.at> |
|
3456
|
37 ## Description: Logit transformation |
|
3200
|
38 |
|
|
39 function y = logit (p) |
|
3426
|
40 |
|
3200
|
41 if (nargin == 1) |
|
|
42 y = logistic_inv (p); |
|
|
43 else |
|
6046
|
44 print_usage (); |
|
3200
|
45 endif |
|
|
46 |
|
6754
|
47 endfunction |
