[SciPy-User] Signal processing and filtering functions
Wed Mar 9 12:17:47 CST 2011
On Wed, 9 Mar 2011 12:01:51 -0600
Warren Weckesser <email@example.com> wrote:
> On Wed, Mar 9, 2011 at 10:33 AM, Joe Kington
>> The SAE filtering operation performs two-pass, zero
>> shift, second-order Butterworth filtering.
>> You may already be aware of it, but that sounds
>>suspiciously like this
>> cookbook example...
> That cookbook code was added to scipy in r4391 and
>r5195. scipy.signal has
> the filtfilt and lfilter_zi function. The basic idea is
>to apply an IIR
> (e.g. Butterworth) filter to the signal twice, first
>forward and then
> There is a lot of room for improvement in that code.
> I've been working on
> rewriting it, and implementing the true Gustafsson
>algorithm; despite the
> comment in the code, lfilter_zi does not implement
> Once the change to github is made, I'll start a branch
>containing this work.
Can you provide a reference wrt Gustafsson's algortihm ?
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