[SciPy-Dev] Signal: Add type III/IV filter calculation to firwin2

Andrey Smirnov andrew.smirnov@gmail....
Thu Jun 23 23:21:56 CDT 2011

Hello everybody,

Since current version of firwin2 can only produce type I and type II
filters as a result, and circumstances where type III/IV are needed are
not unthinkable, I decided to implement said functionality. The results
can be seen at:

I would really appreciate your comments on the code itself and on
whether it is possible to include this functionality into scipy.

Thanks in advance,
Andrey Smirnov

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