[Octave-bug-tracker] [bug #54383] accuracy issues with betainc

[John W. Eaton]

URL:
  <http://savannah.gnu.org/bugs/?54383>

                 Summary: accuracy issues with betainc
                 Project: GNU Octave
            Submitted by: jwe
            Submitted on: Thu 26 Jul 2018 12:59:26 PM UTC
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Inaccurate Result
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: Solaris/SunOS

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Details:

The following test fails on Solaris:


>>>>> processing
/export/home/eaton/local/src/octave-4.4.1-rc1/scripts/specfun/betainc.m
***** assert (betainc (0.99, 20, 30, "upper"), 1.5671643161872703e-47,
-5e-14);
!!!!! test failed
ASSERT errors for:  assert (betainc (0.99, 20, 30,
"upper"),1.5671643161872703e-47,-5e-14)

  Location  |  Observed  |  Expected  |  Reason
     ()       1.5672e-47   1.5672e-47    Rel err 7.4144e-14 exceeds tol 5e-14
by 2e-14






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