[Octave-bug-tracker] [bug #53700] eigs test failure related to ARPACK generating real NaN rather than complex NaN+1i*NaN

[Mike Miller]

Update of bug #53700 (project octave):

                  Status:                    None => Works For Me           

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Follow-up Comment #12:

I can't reproduce on Ubuntu 18.04. Building with OpenBLAS, all tests pass, and
I get


>> A = magic (100) / 10 + eye (100);
>> opts.v0 = (1:100)';
>> opts.maxit = 10;
>> d = eigs (A, 10, "sm", opts);
warning: eigs: Only 4 of the 10 requested eigenvalues converged
warning: called from
    eigs at line 265 column 18
>> idx = find (d == d);
>> d(idx)
ans =

   1.00000 + 0.00000i
   1.00000 - 0.00000i
   1.00000 + 0.00000i
   1.00000 - 0.00000i

>> imag (d(idx))
ans =

   2.2485e-13
  -2.2485e-13
   1.1523e-12
  -1.1523e-12



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