[Octave-bug-tracker] [bug #45810] zp2sos error when calling cplxpair

[Mike Miller]

Follow-up Comment #3, bug #45810 (project octave):

I think there is a compatibility bug with cplxpair here, but maybe also with
zp2sos once that is fixed.

Example:

>>> z1 = [2000 + 4j; 2000 - 4j];
>>> cplxpair (z1)
ans =

   2000 -    4i
   2000 +    4i

>>> z2 = [2000 * (1+eps) + 4j; 2000 * (1-eps) - 4j];
>>> cplxpair (z2)
error: cplxpair: could not pair all complex numbers
error: called from
    cplxpair at line 128 column 9



Can OP or someone try this in Matlab to verify that it should work?

My reading of Matlab's help on cplxpair says that this should work because the
tolerance is taken relative to the magnitude of each value.

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