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[Octave-bug-tracker] [bug #58944] [z, r, p]=qr(a, b) unexpectedly return
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From: |
Marco Caliari |
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Subject: |
[Octave-bug-tracker] [bug #58944] [z, r, p]=qr(a, b) unexpectedly returns z as q instead of q' * b |
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Date: |
Fri, 21 Aug 2020 06:27:40 -0400 (EDT) |
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User-agent: |
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:79.0) Gecko/20100101 Firefox/79.0 |
Follow-up Comment #2, bug #58944 (project octave):
I think that
[C, R, E] = qr (A, B)
should work only for sparse matrices and returns the fill-reducing ordering
matrix E, such that A*X=B iff X=E*(R\C).
It is related to bug #57033, especially comments #6 and #9.
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