On Wed, Aug 29, 2012 at 12:20 AM, Jeffrey Spencer <jeffspencerd@gmail.com> wrote:
The freqz function appears to return the frequency values and the frequency response backwards. Like it is supposed to return in the order (h,w) but it actually returns in the order (w,h).

This can even be seen in the documentation here:
http://docs.scipy.org/doc/scipy/reference/generated/scipy.signal.freqz.html



Jeff,

freqz and freqs both return (w, h), which is correct.

The mistake is in the example in the docstring for freqz.  The line:

>>> h, w = signal.freqz(b)

should be

>>> w, h = signal.freqz(b)


Warren

 


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