[Octave-bug-tracker] [bug #52593] qr(A, 'matrix') and qr(A, 'vector') return the wrong result with a tall skinny matrix

[Joseph Young]

Follow-up Comment #4, bug #52593 (project octave):

Hi, Rik.  Thanks for taking a look at this.  I would contend that it's
partially a MATLAB compatibility issue, but the result for  [Q R
p]=qr(A,'matrix') is actually incorrect.  Octave returns a permutation vector
p when a matrix is explicitly requested.  I would call returning an economy
sized factorization for [Q R p]=qr(A,'vector') when MATLAB returns the full
factorization a compatibility issue.

Anyway, maybe it's not a big deal in how it's categorized, but I wanted to
bring this up in case there's a difference in how and when issues are
prioritized internally.  At the end of the day, I think the same bit of code
will end up fixing both bugs.

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