[Octave-bug-tracker] [bug #60528] betaincinv throws error for some valid inputs

[Rik]

Follow-up Comment #10, bug #60528 (project octave):

I used the style


f(finv (x)) == x


for all of the BIST tests except for the ones specifically for this bug
report.  From betaincinv.m


%!assert <*60528> (betaincinv (1e-6, 1, 3), 3.3333344444450617e-7, 2*eps)
%!assert <*60528> (betaincinv (1-1e-6, 3, 1), 0.9999996666665555, 2*eps)
%!assert (betainc (betaincinv (0.9, 1e-3, 1), 1e-3, 1), 0.9, 2*eps)


I think it is important that the first BIST test, which is a regression test
for the example code in comment #0, be left as a comparison to an exact value.
 The second test is not actually a regression test for this bug report and so
it can be modified to use the other styling and to drop the bug 60528 tag.
 

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