[python-control-developers] pzmap

[Roberto B. <rob...@su...>]

We are looking at the function "pzmap" and we found that the zeros are 
no more plotted.

I think that the problem is related to the implementation of the function

     if (Plot):
         import matplotlib.pyplot as plt
         # Plot the locations of the poles and zeros
         if len(poles) > 0:
             plt.scatter(real(poles), imag(poles), s=50, marker='x')
         if len(zeros) > 0:
             plt.scatter(real(zeros), imag(zeros), s=50, marker='o',
                         facecolors='none')

and in particular to the setting in plt.scatter of the zeros with 
facecolors = 'none' .

Why did you choose this setting?

Thanks in advance

Best regards

Roberto