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// Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
// Copyright (C) 2000 - INRIA - Carlos Klimann
//
// This file must be used under the terms of the CeCILL.
// This source file is licensed as described in the file COPYING, which
// you should have received as part of this distribution. The terms
// are also available at
// http://www.cecill.info/licences/Licence_CeCILL_V2.1-en.txt
//
function [m]=nanmean(x,orient)
//
//This function returns in scalar m the mean of the values (ignoring the
//NANs) of a vector or matrix x.
//
//For a vector or matrix x, m=nanmean(x) or m=nanmean(x,'*')
//returns in scalar m the mean of all the entries (ignoring the NANs) of
//x.
//
//m=nanmean(x,'r') (or, equivalently, m=nanmean(x,1)) returns in
//each entry of the row vector m of type 1xsize(x,'c') the mean of
//each column of x (ignoring the NANs).
//
//m=nanmeanf(x,'c')(or, equivalently, m=nanmean(x,2)) returns in
//each entry of the column vector m of type size(x,'c')x1 the mean of
//each row of x (ignoring the NANs).
//
//
if argn(2)==0 then error(msprintf(gettext("%s: Wrong number of input arguments: %d to %d expected.\n"),"nanmean",1,2)), end
if argn(2)==1 then orient="*",end
//replace nans by 0
isn=isnan(x)
x(isn)=0
N=size(x,orient)-sum(bool2s(isn),orient)
allnans=find(N==0)
N(allnans)=1
m = sum(x,orient)./N;
m(allnans)=%nan
endfunction
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