%QR  	Orthogonal-triangular decomposition.
% 	[Q,R] = QR(X) produces an upper triangular matrix R of
% 	the same dimension as X and a unitary matrix Q so that
% 	X = Q*R.
% 	[Q,R,E] = QR(X) produces a permutation matrix E , an
% 	upper triangular R with decreasing diagonal elements and
% 	a unitary Q so that X*E = Q*R.
% 	By itself, QR(X) returns the output of LINPACK'S ZQRDC
% 	routine.  TRIU(QR(X)) is R.
%
%	See also QRDELETE, QRINSERT.

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