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// Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
// Copyright (C) 1995-2010 - INRIA - Serge Steer
//
// 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 d=%r_triu(a,k)
// r_triu - implement triu function for rationnal matrix ,..
if argn(2)<2 then
k=0,
else
if type(k)<>1 then error(53,2);end
if size(k,"*")<>1 then error(89,2);end
if ~isreal(k) then error(52,2);end
end
d=rlist(triu(a.num,k),triu(a.den,k)+tril(ones(a.den),k-1),a.dt)
endfunction
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