| MATLAB Function Reference | Search Help Desk |
| qrdelete | See Also |
Delete column from QR factorization
[Q,R] = qrdelete(Q,R,j)
[Q,R] = qrdelete(Q,R,j)
changes Q and R to be the factorization of the matrix A with its jth column, A(:,j), removed.
Inputs Q and R represent the original QR factorization of matrix A, as returned by the statement [Q,R] = qr(A). Argument j specifies the column to be removed from matrix A.
The qrdelete function uses a series of Givens rotations to zero out the appropriate elements of the factorization.
qr Orthogonal-triangular decomposition
qrinsert Insert column in QR factorization