[Octave-bug-tracker] [bug #49523] eigs (R2013b and later) uses NaNs, not zeros, for unconverged Ritz values

[anonymous]

Follow-up Comment #8, bug #49523 (project octave):

@Rik: Interesting.  On R2016b, on my hardware, I consistently see that
allocating NaNs is about 10 times slower than just zeros.  Allocating ones is
also about 10 times slower than just zeros on my hardware.

In any case, I don't feel strongly either way on how to handle the values of
the "non-converged" eigenvectors and I do generally agree with trying to
prevent garbage in, garbage out.  I was just pointing out that there was a
potential downside to explicitly setting all the entries in the eigenvectors.

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