[Octave-bug-tracker] [bug #35611] Bug in bincoeff with large n and k

[Rik]

Update of bug #35611 (project octave):

                  Status:               Confirmed => Wont Fix               
             Open/Closed:                    Open => Closed                 

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Follow-up Comment #4:

Marco,

This is just what I suspected.  The underlying routine for gammaln probably
differs by a few eps depending on the backend library.  For your system, the
result is slightly under the true result and rounding brings it up to the
correct value.  For the bug reporter's system the result is slightly higher
than the true result and rounding causes an error.

To recap, there isn't any consistency that Octave can exploit and so this bug
can't be "fixed".  On the other hand, there is a clear workaround which is to
use the appropriate function, nchoosek for integers, and bincoeff for real
values.

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