[Octave-bug-tracker] [bug #47415] out of memory negating a permutation matrix

[Carlo de Falco]

Follow-up Comment #23, bug #47415 (project octave):

Lachlan,

Maybe I missed something, but I cannot think of a case when a user creates a
full matrix and Octave converts it to permutation matrix automatically, did
you ever see this happen? What is an example?

I was assuming that automatic conversions only occur from the most specialized
to the most general class, i.e. 

diagonal -> permutation -> sparse -> full

but never the other way, is this assumption wrong?



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