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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 [y] = mean(x,orient)
//
// NOTES
// - modified by bruno to handle the case when x is an hypermatrix
// - restricted to matrix or hypermatrix of "constants" (that is
// real or complex numbers)
// - mean([]) return nan but mean([],orient) return [] (this
// is strange but corresponds to matlab behavior)
[lhs,rhs] = argn()
// some arguments checking
if rhs == 0 | rhs > 2 then
error(msprintf(gettext("%s: Wrong number of input argument: %d to %d expected.\n"),"mean",1,2)),
else
if type(x) ~= 1 & typeof(x) ~= "hypermat" then
error(msprintf(gettext("%s: Wrong type for input argument #%d: Real vector or matrix expected.\n"), "mean",1))
end
if type(x) ~= 1 then // that is x is an hypermat !
if type(x.entries) ~= 1 then
error(msprintf(gettext("%s: Wrong type for input argument #%d.\n"),"mean",1))
end
end
if rhs == 2 then
if orient == "r" then, orient = 1, end
if orient == "c" then, orient = 2, end
if orient == "m" then
flag=find(size(x)>1,1)
if flag==[] then
y=mean(x)
return
else
y=mean(x,flag)
return
end
end
if floor(orient)~=orient | orient < 1 | orient > length(size(x)) then
error(msprintf(gettext("%s: Wrong type for input argument #%d: Scalar or vector expected.\n"),"mean",2)),
end
end
end
if rhs==1 then
if x==[] then y=%nan;return,end
y=sum(x)/size(x,"*")
else
if x==[] then y=[];return,end
y=sum(x,orient)/size(x,orient)
end
endfunction
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