[Octave-bug-tracker] [bug #44722] linsolve.m: Rand unit test fails randomly...

[Julien Bect]

URL:
  <http://savannah.gnu.org/bugs/?44722>

                 Summary: linsolve.m: Rand unit test fails randomly...
                 Project: GNU Octave
            Submitted by: jbect
            Submitted on: sam. 04 avril 2015 16:52:55 GMT
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Other
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.0.0-rc2
        Operating System: GNU/Linux

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Details:

I get random test failures for linsolve on a Debian wheezy (7.8) x86_64
machine:

>>>>> processing
/usr/local/src/octave/default/scripts/linear-algebra/linsolve.m
***** test
 n = 4;
 A = triu (rand (n));
 x = rand (n, 1);
 b = A' * x;
 opts.UT = true;
 opts.TRANSA = true;
 assert (linsolve (A, b, opts), A' \ b);

!!!!! test failed
ASSERT errors for:  assert (linsolve (A, b, opts),A' \ b)

  Location  |  Observed  |  Expected  |  Reason
    (1)        0.42063      0.42063      Abs err 5.5511e-17 exceeds tol 0
    (2)        0.68722      0.68722      Abs err 4.1078e-15 exceeds tol 0
    (3)        0.25533      0.25533      Abs err 2.1094e-15 exceeds tol 0
    (4)        0.52907      0.52907      Abs err 7.3275e-15 exceeds tol 0





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