// 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 it=invsyslin(t)

    if typeof(t)<>"state-space" then
        error(msprintf(gettext("%s: Wrong type for input argument #%d: Linear state space expected.\n"),"invsyslin",1))
    end

    [p,m]=size(t.D);
    if p <> m then
        warning(msprintf(gettext("%s: Wrong size for input argument #%d: Square system expected.\n"),"invsyslin",1)),
    end
    //
    d=pinv(t.D);
    it=syslin(t.dt,t.A-t.B*d*t.C,t.B*d,-d*t.C,d,t.X0);
endfunction