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// Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
// Copyright (C) XXXX - INRIA
// Copyright (C) XXXX - ENPC
// Copyright (C) XXXX - Ecole des Mines de Nantes - Philippe Castagliola
// 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-en.txt
function sd=st_deviation(x,cr)
//
if argn(2)<2 then cr='*',end
if x == [] then sd=%nan;return ;end
if typeof(x)=='hypermat' then sd=%hm_st_deviation(x,cr),return,end
[m,n]=size(x);
if cr=='*' then
n=m*n
select n
case 0 then sd=%nan
case 1 then sd=0
else
sd=sqrt(sum((x-mean(x)).^2)/(n-1));
end
elseif cr=='c'|cr==2
if n==1 then
sd=zeros(m,1)
else
sd=sqrt(sum((x-mean(x,'c')*ones(x(1,:))).^2,'c')/(n-1));
end
elseif cr=='r'|cr==1
if m==1 then
sd=zeros(1,n)
else
sd=sqrt(sum((x-ones(x(:,1))*mean(x,'r')).^2,'r')/(m-1));
end
else
error(msprintf(gettext("%s: Wrong value for input argument #%d: ''%s'', ''%s'', ''%s'', %d or %d expected.\n"),"st_deviation",2,"*","r","c",1,2));
end
endfunction
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