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From: sara on 7 Jun 2010 13:26
Dear Matlab community,

As the qr documentation states that it uses DGEQRF Lapack subroutine to calculate the QR factorization. I have tried this method, and it worked for only certain kind of matrices (i.e random matrix), but it didn't exactly match the more general matrix (not necessarily rank deficient, but more structured than just a random matrix)

The documentation, doesn't mention the use of any pivoting, or any other LaPack subroutine, for the [q r] = qr(A,0).

If you have came across a similar task, I would really appreciate your insight.

I understand that the qr is built in, and not much details can be available, but any hint would be so much appreciate it.

Thank you,
Sara
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