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[Octave-bug-tracker] [bug #49996] [octave forge] (signal) cheby2 produce
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From: |
Bill Lash |
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Subject: |
[Octave-bug-tracker] [bug #49996] [octave forge] (signal) cheby2 produces zeros that are not quite complex conjugate pairs |
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Date: |
Thu, 28 Feb 2019 23:34:11 -0500 (EST) |
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User-agent: |
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:65.0) Gecko/20100101 Firefox/65.0 |
Follow-up Comment #17, bug #49996 (project octave):
I just noticed that this got updated, and so I took another look at this now
that cplxpair.m has been updated. I am attaching a patch that solves, at
least, the reported problem. The change is to cheby2.m and uses cplxpair on
the zero and pole vectors before calling sf2trans. I plotted the frequency
response of the resulting filter, and it looks like it meets the
specification.
I'm attaching a patch called newcheby2.patch
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