[Octave-bug-tracker] [bug #43349] asin() behaves differently from Matlab for arguments larger than 1

[Rik]

Follow-up Comment #12, bug #43349 (project octave):

@Michael: Yes, there would need to be a review of most of the mapping
functions in lo-mappers.cc to see if this change needs to be done.  Maybe we
could interest someone in doing that, or maybe it has to wait until the next
GSOC round?

I tried to test in R using an online execution engine but the result I get is
NaN.  I think it's good enough validation that Mathematica and Matlab use the
same convention.

Another possible implementation would be to use copysign instead of the
tertiary operator `?'.  I don't know which would be faster.


  return fabs (x) > 1.0 ? asin (Complex (x, copysign (x, 0.0)))
                        : Complex (asin (x));



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