[Octave-bug-tracker] [bug #63937] `residue` returns incorrect result in case of pole at zero

[Rik]

Update of bug #63937 (project octave):

                  Status:                    None => In Progress            
             Assigned to:                    None => rik5                   

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Follow-up Comment #2:

This is actually two bugs in one.  The mpoles function needs to be fixed, but
even with that in place residue also requires changes for the motivating
example in this bug report.

I have modified mpoles.m, but while inspecting the code I found that it is
very old (original check-in in 2007) and there are many improvements that
should be made including using correct indentation, validating the inputs,
having complete BIST tests, matching the variable names in the code to the
documentation, and expanding the documentation to clearly state what the
function does.  I've started on that.


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