** Delete a column from the QR factorization. **

** If [Q,R] = qr(A) is the original QR factorization of A, **

** then [Q,R] = qrdelete(Q,R,j) changes Q and R to be the **

** factorization of the matrix with A(:,j) removed. **

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** See also QR , QRINSERT , PLANEROT . **

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