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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 X = sylv(A,B,C,flag)
// solve A*X+X*B=C if flag=='c' or A*X*B+X=C if flag=='d'
if argn(2)<>4 then
error(msprintf(gettext("%s: Wrong number of input argument(s): %d expected.\n"),"sylv",4))
end
if size(A,1)<> size(A,2) then
error(msprintf(gettext("%s: Wrong size for input argument #%d: A square matrix expected.\n"), "sylv", 1));
end
if size(B,1)<> size(B,2) then
error(msprintf(gettext("%s: Wrong size for input argument #%d: A square matrix expected.\n"), "sylv", 2));
end
if size(C,1)<> size(A,1) then
error(msprintf(gettext("%s: Incompatible input arguments #%d and #%d: Same number of rows expected.\n"),"sylv",1,3))
end
if size(C,2)<> size(B,2) then
error(msprintf(gettext("%s: Incompatible input arguments #%d and #%d: Same number of columns expected.\n"),"sylv",2,3))
end
if flag=="c" then
flag=[0 0 0],
elseif flag=="d" then
flag=[1 0 0],
else
error(msprintf(gettext("%s: Wrong value for input argument #%d: ""c"" or ""d"" expected.\n"), "sylv", 4));
end
X=linmeq(1,A,B,C,flag)
endfunction
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