Mercurial > octave
view scripts/statistics/empirical_inv.m @ 31206:7ae0a0772e9d
maint: merge stable to default
author | Arun Giridhar <arungiridhar@gmail.com> |
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date | Sun, 28 Aug 2022 12:21:36 -0400 |
parents | 5d3faba0342e |
children | 597f3ee61a48 |
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######################################################################## ## ## Copyright (C) 1996-2022 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 {} {@var{q} =} empirical_inv (@var{x}, @var{data}) ## For each element of @var{x}, compute the quantile (the inverse of the CDF) ## at @var{x} of the empirical distribution obtained from the ## univariate sample @var{data}. ## @end deftypefn function q = empirical_inv (x, data) if (nargin != 2) print_usage (); endif if (! isvector (data)) error ("empirical_inv: DATA must be a vector"); endif q = discrete_inv (x, data, ones (size (data))); endfunction %!shared x,v,y %! x = [-1 0 0.1 0.5 1 2]; %! v = 0.1:0.2:1.9; %! y = [NaN v(1) v(1) v(end/2) v(end) NaN]; %!assert (empirical_inv (x, v), y, eps) ## Test class of input preserved %!assert (empirical_inv ([x, NaN], v), [y, NaN], eps) %!assert (empirical_inv (single ([x, NaN]), v), single ([y, NaN]), eps) %!assert (empirical_inv ([x, NaN], single (v)), single ([y, NaN]), eps) ## Test input validation %!error <Invalid call> empirical_inv () %!error <Invalid call> empirical_inv (1) %!error empirical_inv (1, ones (2))