/usr/share/octave/packages/statistics-1.3.0/nanmax.m is in octave-statistics 1.3.0-1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 | ## Copyright (C) 2001 Paul Kienzle <pkienzle@users.sf.net>
##
## This program 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.
##
## This program 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
## this program; if not, see <http://www.gnu.org/licenses/>.
## -*- texinfo -*-
## @deftypefn {Function File} {[@var{v}, @var{idx}] =} nanmax (@var{X})
## @deftypefnx{Function File} {[@var{v}, @var{idx}] =} nanmax (@var{X}, @var{Y})
## Find the maximal element while ignoring NaN values.
##
## @code{nanmax} is identical to the @code{max} function except that NaN values
## are ignored. If all values in a column are NaN, the maximum is
## returned as NaN rather than [].
##
## @seealso{max, nansum, nanmin, nanmean, nanmedian}
## @end deftypefn
function [v, idx] = nanmax (X, Y, DIM)
if nargin < 1 || nargin > 3
print_usage;
elseif nargin == 1 || (nargin == 2 && isempty(Y))
nanvals = isnan(X);
X(nanvals) = -Inf;
[v, idx] = max (X);
v(all(nanvals)) = NaN;
elseif (nargin == 3 && isempty(Y))
nanvals = isnan(X);
X(nanvals) = -Inf;
[v, idx] = max (X,[],DIM);
v(all(nanvals,DIM)) = NaN;
else
Xnan = isnan(X);
Ynan = isnan(Y);
X(Xnan) = -Inf;
Y(Ynan) = -Inf;
if (nargin == 3)
[v, idx] = max(X,Y,DIM);
else
[v, idx] = max(X,Y);
endif
v(Xnan & Ynan) = NaN;
endif
endfunction
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