%TRIL	Lower triangle.
%	TRIL(X) is the lower triangular part of X.
%	TRIL(X,K) is the elements on and below the K-th diagonal
%	of X .  K = 0 is the main diagonal, K > 0 is above the
%	main diagonal and K < 0 is below the main diagonal.

%	Copyright (c) 1984-93 by The MathWorks, Inc.
%	Built-in function.
