[Octave-bug-tracker] [bug #40668] -NA is inconsistent with other operations on NA

[John W. Eaton]

Follow-up Comment #4, bug #40668 (project octave):

The particular values for NA were taken from R and were chosen so that you
could exchange binary data files between Octave and R and preserve NA.

But in more than a decade, nothing else about NA has really been implemented
in Octave.  And I'm not sure we should start now.  It's pretty much impossible
for us to guarantee that all operations on NA return NA rather than NaN.  It's
certainly impossible for us to guarantee that for operations that involve
external numerical libraries like ATLAS or OpenBLAS.

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