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TRIU.M
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1993-03-23
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270b
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15 lines
function Y = triu(X,k)
%Y=triu(X,k)
%Upper triangle of X
% S.Halevy 7/31/92
% Copyright (c) 1992 by the MathWizards
k=expr_sel(nargin==1,0,k);
[m,n] = size(X);
Y = zeros(m,n);
for j = max(1,1+k):n
i = 1:min(m,j-k);
Y(i,j) = X(i,j);
end