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// 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 [A,B,C,D]=abcd(sl)
// Retrieves [A,B,C,D] matrices from linear system sl
select typeof(sl)
case "state-space" then
[A,B,C,D]=sl(2:5)
return;
case "rational" then
w=tf2ss(sl);
[A,B,C,D]=w(2:5)
else
error(msprintf(_("%s: Wrong type for input argument: Linear dynamical system expected.\n"),"abcd"))
end
endfunction
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