Mercurial > octave
view scripts/statistics/discrete_pdf.m @ 30330:01de0045b2e3
maint: Shorten some long lines to <= 80 characters (bug #57599)
* audiorecorder.m, disable_diagonal_matrix.m, disable_permutation_matrix.m,
disable_range.m, atan2d.m, accumdim.m, bitcmp.m, blkdiag.m, cplxpair.m,
dblquad.m, integral2.m, integral3.m, interp2.m, interpn.m, logspace.m,
delaunayn.m, griddata3.m, imread.m, genvarname.m, strread.m, nthargout.m,
parseparams.m, lsqnonneg.m, qp.m, sqp.m, material.m, __gnuplot_legend__.m,
plot.m, __gnuplot_drawnow__.m, polygcd.m, polyvalm.m, setdiff.m, fftfilt.m,
eigs.m, betainc.m, cosint.m, factor.m, gallery.m, toeplitz.m, discrete_cdf.m,
discrete_inv.m, discrete_pdf.m, iqr.m, kurtosis.m, quantile.m, bin2dec.m,
isstrprop.m, mat2str.m, strchr.m, strsplit.m, __have_feature__.m, datenum.m,
datevec.m, eomday.m, weboptions.m:
maint: Shorten some long lines to <= 80 characters.
author | Rik <rik@octave.org> |
---|---|
date | Tue, 23 Nov 2021 13:28:34 -0800 |
parents | 7854d5752dd2 |
children | 796f54d4ddbf |
line wrap: on
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######################################################################## ## ## Copyright (C) 1996-2021 The Octave Project Developers ## ## See the file COPYRIGHT.md in the top-level directory of this ## distribution or <https://octave.org/copyright/>. ## ## 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 ## <https://www.gnu.org/licenses/>. ## ######################################################################## ## -*- texinfo -*- ## @deftypefn {} {} discrete_pdf (@var{x}, @var{v}, @var{p}) ## For each element of @var{x}, compute the probability density function (PDF) ## at @var{x} of a univariate discrete distribution which assumes the values ## in @var{v} with probabilities @var{p}. ## @end deftypefn function pdf = discrete_pdf (x, v, p) if (nargin != 3) print_usage (); endif if (! isvector (v)) error ("discrete_pdf: V must be a vector"); elseif (any (isnan (v))) error ("discrete_pdf: V must not have any NaN elements"); elseif (! isvector (p) || (length (p) != length (v))) error ("discrete_pdf: P must be a vector with length (V) elements"); elseif (! (all (p >= 0) && any (p))) error ("discrete_pdf: P must be a nonzero, non-negative vector"); endif ## Reshape and normalize probability vector. Values not in table get 0 prob. p = [0 ; p(:)/sum(p)]; if (isa (x, "single") || isa (v, "single") || isa (p, "single")) pdf = NaN (size (x), "single"); else pdf = NaN (size (x)); endif k = ! isnan (x); [vs, vi] = sort (v(:)); pdf(k) = p([0 ; vi](lookup (vs, x(k), 'm') + 1) + 1); endfunction %!shared x,v,p,y %! x = [-1 0.1 1.1 1.9 3]; %! v = 0.1:0.2:1.9; %! p = 1/length (v) * ones (1, length (v)); %! y = [0 0.1 0.1 0.1 0]; %!assert (discrete_pdf ([x, NaN], v, p), [y, NaN], 5*eps) ## Test class of input preserved %!assert (discrete_pdf (single ([x, NaN]), v, p), %! single ([y, NaN]), 5*eps ("single")) %!assert (discrete_pdf ([x, NaN], single (v), p), %! single ([y, NaN]), 5*eps ("single")) %!assert (discrete_pdf ([x, NaN], v, single (p)), %! single ([y, NaN]), 5*eps ("single")) ## Test input validation %!error <Invalid call> discrete_pdf () %!error <Invalid call> discrete_pdf (1) %!error <Invalid call> discrete_pdf (1,2) %!error discrete_pdf (1, ones (2), ones (2,1)) %!error discrete_pdf (1, [1 ; NaN], ones (2,1)) %!error discrete_pdf (1, ones (2,1), ones (1,1)) %!error discrete_pdf (1, ones (2,1), [1 -1]) %!error discrete_pdf (1, ones (2,1), [1 NaN]) %!error discrete_pdf (1, ones (2,1), [0 0])