[SciPy-User] [SciPy-user] zplane function equivalent

[ninjasmith]

replying to my own post.

using the functon 

scipy.signal.tf2zpk gives the poles and zeros which can then be plotted
using

scatter(real(p),imag(p))
scatter(real(z),imag(z))



ninjasmith wrote:
> 
> Hi,
> 
> I'm looking for a function that performs the equivalent of zplane in
> matlab.  That is I have the coefficients of a filter and I would like to
> see the poles and zeros plotted on the zplane.
> 
> anyone managed this before?  I guess I could find the roots myself and
> then build a custom plot to do it but I'd rather not :)
> 

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