/usr/share/octave/packages/3.2/nan-2.4.4/flag_nans_occured.m is in octave-nan 2.4.4-1.
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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 | function [flag]=flag_nans_occured()
% FLAG_NANS_OCCURED checks whether the last call(s) to sumskipnan or covm
% contained any not-a-numbers in the input argument. Because many other
% functions like mean, std, etc. are also using sumskipnan,
% also these functions can be checked for NaN's in the input data.
%
% A call to FLAG_NANS_OCCURED() resets also the flag whether NaN's occured.
% Only sumskipnan or covm can set the flag again.
%
% see also: SUMSKIPNAN, COVM
% $Id$
% Copyright (C) 2009 by Alois Schloegl <alois.schloegl@gmail.com>
% This function is part of the NaN-toolbox
% http://pub.ist.ac.at/~schloegl/matlab/NaN/
% 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/>.
global FLAG_NANS_OCCURED;
%%% check whether FLAG was already defined
if isempty(FLAG_NANS_OCCURED),
FLAG_NANS_OCCURED = logical(0); % default value
end;
flag = FLAG_NANS_OCCURED; % return value
FLAG_NANS_OCCURED = logical(0); % reset flag
return;
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