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view scripts/statistics/distributions/laplace_cdf.m @ 11523:fd0a3ac60b0e
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author | John W. Eaton <jwe@octave.org> |
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date | Fri, 14 Jan 2011 05:47:45 -0500 |
parents | a1dbe9d80eee |
children | 19b9f17d22af |
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## Copyright (C) 1995-2011 Kurt Hornik ## ## This file is part of Octave. ## ## Octave is free software; you can redistribute it and/or modify it ## under the terms of the GNU General Public License as published by ## the Free Software Foundation; either version 3 of the License, or (at ## your option) any later version. ## ## Octave is distributed in the hope that it will be useful, but ## WITHOUT ANY WARRANTY; without even the implied warranty of ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU ## General Public License for more details. ## ## You should have received a copy of the GNU General Public License ## along with Octave; see the file COPYING. If not, see ## <http://www.gnu.org/licenses/>. ## -*- texinfo -*- ## @deftypefn {Function File} {} laplace_cdf (@var{x}) ## For each element of @var{x}, compute the cumulative distribution ## function (CDF) at @var{x} of the Laplace distribution. ## @end deftypefn ## Author: KH <Kurt.Hornik@wu-wien.ac.at> ## Description: CDF of the Laplace distribution function cdf = laplace_cdf (x) if (nargin != 1) print_usage (); endif cdf = zeros (size (x)); k = find (isnan (x)); if (any (k)) cdf(k) = NaN; endif k = find (x == Inf); if (any (k)) cdf(k) = 1; endif k = find ((x > -Inf) & (x < Inf)); if (any (k)) cdf(k) = (1 + sign (x(k)) .* (1 - exp (- abs (x(k))))) / 2; endif endfunction