// Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
// Copyright (C) INRIA -
//
// 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 [t]=equil(p,q)

    t=chol(q);
    [u,s,u]=svd(t*p*t');
    s=diag(s);
    ll=ones(s)./sqrt(sqrt(s));
    t=diag(ll)*u'*t
endfunction