[Octave-bug-tracker] [bug #63848] Mean: some single class inputs can hit precision limit with sum

[Nicholas Jankowski]

Follow-up Comment #29, bug #63848 (group octave):

just to add to what markus said, that test was added as a known failure
condition for simple mean calculation with double precision numbers.  Unless
we implement an alternative mean or summation calculation to avoid such
limits, or move to standard operation in quad precision arithmetic, that test
is expected to fail.  

Note in the test report it says
PASSES 79 out of 80 tests (1 known bug)

the presence of the bug number indicates to the test routine that it's a known
failure.  if you ran the full test suite it would show up as an XFAIL
(expected fail). 

the comments below do link to some of the other discussions about implementing
block based or other summation routines that could preserve precision for some
cases, where most effort has stalled out. if you're able to contribute to
those it could be of value to octave.


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