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// Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
// Copyright (C) 1999 - 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]=nanmeanf(val,fre,orient)
//
//This function returns in scalar m the mean of the values (ignoring the
//NANs) of a vector or matrix val, each counted with a frequency
//signaled by the corresponding values of the integer vector or matrix
//fre with the same type of val.
//
//For a vector or matrix val, m=nanmeanf(val,fre) or
//m=nanmeanf(val,fre,'*') returns in scalar m the mean of all the
//entries (ignoring the NANs) of val, each value counted with the
//multiplicity indicated by the corresponding value of fre.
//
//m=nanmeanf(val,fre,'r')(or, equivalently, m=nanmeanf(val,fre,1))
//returns in each entry of the row vector m of type 1xsize(val,'c') the
//mean of each column of val (ignoring the NANs), each value counted
//with the multiplicity indicated by the corresponding value of fre.
//
//m=nanmeanf(val,fre,'c')(or, equivalently, m=nanmeanf(val,fre,2))
//returns in each entry of the column vector m of type size(val,'c')x1
//the mean of each row of val (ignoring the NANs), each value counted
//with the multiplicity indicated by the corresponding value of fre.
//
//
[lhs,rhs]=argn(0)
if rhs<2|rhs>3 then error(msprintf(gettext("%s: Wrong number of input arguments: %d to %d expected.\n"),"nanmeanf",2,3)), end
if val==[]|fre==0 then m=[], return,end
isn=isnan(val)
fre(isn)=0
val(isn)=0
if rhs==2 then
m=sum(val.*fre)/sum(fre)
elseif orient=="*" then
m=sum(val.*fre)/sum(fre)
elseif orient=="r"|orient=="c"|orient==1|orient==2 then
m=sum(val.*fre,orient)./sum(fre,orient)
else error(msprintf(gettext("%s: Wrong value for input argument #%d: ''%s'', ''%s'', ''%s'', %d or %d expected.\n"),"nanmeanf",3,"*","r","c",1,2)),
end
endfunction
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