Mercurial > octave-nkf
annotate scripts/statistics/distributions/binoinv.m @ 11472:1740012184f9
Use uppercase for variable names in error() strings to match Info documentation. Only m-files done.
author | Rik <octave@nomad.inbox5.com> |
---|---|
date | Sun, 09 Jan 2011 21:33:04 -0800 |
parents | 95c3e38098bf |
children | fd0a3ac60b0e |
rev | line source |
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7017 | 1 ## Copyright (C) 1995, 1996, 1997, 2005, 2006, 2007 Kurt Hornik |
5410 | 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. | |
5410 | 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/>. | |
5410 | 18 |
19 ## -*- texinfo -*- | |
5411 | 20 ## @deftypefn {Function File} {} binoinv (@var{x}, @var{n}, @var{p}) |
5410 | 21 ## For each element of @var{x}, compute the quantile at @var{x} of the |
22 ## binomial distribution with parameters @var{n} and @var{p}. | |
23 ## @end deftypefn | |
24 | |
5428 | 25 ## Author: KH <Kurt.Hornik@wu-wien.ac.at> |
5410 | 26 ## Description: Quantile function of the binomial distribution |
27 | |
5411 | 28 function inv = binoinv (x, n, p) |
5410 | 29 |
30 if (nargin != 3) | |
6046 | 31 print_usage (); |
5410 | 32 endif |
33 | |
34 if (!isscalar (n) || !isscalar (p)) | |
35 [retval, x, n, p] = common_size (x, n, p); | |
36 if (retval > 0) | |
11472
1740012184f9
Use uppercase for variable names in error() strings to match Info documentation. Only m-files done.
Rik <octave@nomad.inbox5.com>
parents:
10549
diff
changeset
|
37 error ("binoinv: X, N and P must be of common size or scalars"); |
5410 | 38 endif |
39 endif | |
40 | |
41 sz = size (x); | |
42 inv = zeros (sz); | |
43 | |
44 k = find (!(x >= 0) | !(x <= 1) | !(n >= 0) | (n != round (n)) | |
10549 | 45 | !(p >= 0) | !(p <= 1)); |
5410 | 46 if (any (k)) |
47 inv(k) = NaN; | |
48 endif | |
49 | |
50 k = find ((x >= 0) & (x <= 1) & (n >= 0) & (n == round (n)) | |
10549 | 51 & (p >= 0) & (p <= 1)); |
5410 | 52 if (any (k)) |
53 if (isscalar (n) && isscalar (p)) | |
5411 | 54 cdf = binopdf (0, n, p) * ones (size(k)); |
5410 | 55 while (any (inv(k) < n)) |
10549 | 56 m = find (cdf < x(k)); |
57 if (any (m)) | |
5410 | 58 inv(k(m)) = inv(k(m)) + 1; |
5411 | 59 cdf(m) = cdf(m) + binopdf (inv(k(m)), n, p); |
10549 | 60 else |
5410 | 61 break; |
10549 | 62 endif |
5410 | 63 endwhile |
64 else | |
5482 | 65 cdf = binopdf (0, n(k), p(k)); |
5410 | 66 while (any (inv(k) < n(k))) |
10549 | 67 m = find (cdf < x(k)); |
68 if (any (m)) | |
5410 | 69 inv(k(m)) = inv(k(m)) + 1; |
5411 | 70 cdf(m) = cdf(m) + binopdf (inv(k(m)), n(k(m)), p(k(m))); |
10549 | 71 else |
5410 | 72 break; |
10549 | 73 endif |
5410 | 74 endwhile |
75 endif | |
76 endif | |
77 | |
78 endfunction |