[SciPy-User] Very simple IIR filters?

Travis Oliphant travis@continuum...
Mon Oct 29 10:56:29 CDT 2012


On Oct 29, 2012, at 8:09 AM, Sturla Molden wrote:

> I have noticed that scipy.signal lacks the simplest class of IIR filters 
> (in fact the one I use most frequently). Specifically:
> 
> - RC (single-pole)
> - Notch
> - Band-pass (inverted notch)
> - Anti-DC (zero at DC)
> 
> These are of course very easy to construct and use with sp.signal.filter 
> (and/or filtfilt). But I think it might be beneficial for some users to 
> have them in scipy.
> 
> Due to their size, they can be make a bit faster by running the loop in 
> Cython instead of using sp.signal.filter (though I've never had use for 
> this optimization).
> 
> Would this be a useful contribution?

I think so. 

-Travis

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> Sturla
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