Mercurial > hg > octave-nkf
annotate scripts/statistics/distributions/geoinv.m @ 11523:fd0a3ac60b0e
update copyright notices
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Fri, 14 Jan 2011 05:47:45 -0500 |
| parents | 1740012184f9 |
| children | 19b9f17d22af |
| rev | line source |
|---|---|
| 11523 | 1 ## Copyright (C) 1995-2011 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} {} geoinv (@var{x}, @var{p}) |
| 5410 | 21 ## For each element of @var{x}, compute the quantile at @var{x} of the |
| 22 ## geometric distribution with parameter @var{p}. | |
| 23 ## @end deftypefn | |
| 24 | |
| 5428 | 25 ## Author: KH <Kurt.Hornik@wu-wien.ac.at> |
| 5410 | 26 ## Description: Quantile function of the geometric distribution |
| 27 | |
| 5411 | 28 function inv = geoinv (x, p) |
| 5410 | 29 |
| 30 if (nargin != 2) | |
| 6046 | 31 print_usage (); |
| 5410 | 32 endif |
| 33 | |
| 34 if (!isscalar (x) && !isscalar (p)) | |
| 35 [retval, x, p] = common_size (x, 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:
7017
diff
changeset
|
37 error ("geoinv: X and P must be of common size or scalar"); |
| 5410 | 38 endif |
| 39 endif | |
| 40 | |
| 41 inv = zeros (size (x)); | |
| 42 | |
| 43 k = find (!(x >= 0) | !(x <= 1) | !(p >= 0) | !(p <= 1)); | |
| 44 if (any (k)) | |
| 45 inv(k) = NaN; | |
| 46 endif | |
| 47 | |
| 48 k = find ((x == 1) & (p >= 0) & (p <= 1)); | |
| 49 if (any (k)) | |
| 50 inv(k) = Inf; | |
| 51 endif | |
| 52 | |
| 53 k = find ((x > 0) & (x < 1) & (p > 0) & (p <= 1)); | |
| 54 if (any (k)) | |
| 55 if (isscalar (x)) | |
| 56 inv(k) = max (ceil (log (1 - x) ./ log (1 - p(k))) - 1, 0); | |
| 57 elseif (isscalar (p)) | |
| 58 inv(k) = max (ceil (log (1 - x(k)) / log (1 - p)) - 1, 0); | |
| 59 else | |
| 60 inv(k) = max (ceil (log (1 - x(k)) ./ log (1 - p(k))) - 1, 0); | |
| 61 endif | |
| 62 endif | |
| 63 | |
| 64 endfunction |