/usr/share/octave/packages/3.2/statistics-1.0.10/nanmean.m is in octave-statistics 1.0.10-1.
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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 | ## Copyright (C) 2001 Paul Kienzle
##
## 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 2 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} =} nanmean (@var{X})
## @deftypefnx{Function File} {@var{v} =} nanmean (@var{X}, @var{dim})
## Compute the mean value while ignoring NaN values.
##
## @code{nanmean} is identical to the @code{mean} function except that NaN values
## are ignored. If all values are NaN, the mean is returned as NaN.
##
## @seealso{mean, nanmin, nanmax, nansum, nanmedian}
## @end deftypefn
function v = nanmean (X, varargin)
if nargin < 1
usage ("v = nanmean(X [, dim])");
else
n = sum (!isnan(X), varargin{:});
n(n == 0) = NaN;
X(isnan(X)) = 0;
v = sum (X, varargin{:}) ./ n;
endif
endfunction
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