Hi Warren,
thanks for this example!
I am getting the following error:
Library/Frameworks/Python.framework/Versions/6.0.0/lib/python2.6/site-packages/scipy/signal/filter_design.py:224: BadCoefficients: Badly conditionned filter coefficients (numerator): the results may be meaningless
"results may be meaningless", BadCoefficients)
For any attempt to filter a low-pass below 12 Hz in this example (so - I don't get the plot you got - instead I get a flat line on the bottom subplot). Do you (or anyone?) have any idea why that is?
Cheers,
Ariel
Nils Wagner wrote:I posted an example low-pass filtering using 'butter' and 'lfilter' from
> Hi all,
>
> I have two questions concerning signal processing
>
> I have used scipy.stats.signaltonoise to compute the
> signal-to-noise ratio.
> The value is 0.0447.
> How can I judge it ?
>
> How can I filter out high frequencies using scipy ?
>
scipy.signal here:
http://mail.scipy.org/pipermail/scipy-user/2010-January/024032.html
Warren
> How can I eliminate noise from the signal ?
>
> Nils
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