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[Octave-bug-tracker] [bug #49523] eigs (R2013b and later) uses NaNs, not

From: Dmitri A. Sergatskov
Subject: [Octave-bug-tracker] [bug #49523] eigs (R2013b and later) uses NaNs, not zeros, for unconverged Ritz values
Date: Thu, 30 Nov 2017 10:59:33 -0500 (EST)
User-agent: Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:57.0) Gecko/20100101 Firefox/57.0 
Follow-up Comment #28, bug #49523 (project octave):

octave:1> A = 1i * magic (100) + eye (100);
octave:2> opts.v0 = (1:100)';
octave:3> opts.maxit = 7;
octave:4> d = eigs (A, 10, "sm", opts)
warning: eigs: Only 3 of the 10 requested eigenvalues converged
warning: called from
    eigs at line 265 column 18
d =

   1.00000 - 0.00000i
   1.00000 + 0.00000i
   1.00000 - 0.00000i
       NaN +     NaNi
       NaN +     NaNi
       NaN +     NaNi
       NaN +     NaNi
       NaN +     NaNi
       NaN +     NaNi
       NaN +     NaNi

(Same with either ref blas, atlas, openblas)

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