[SciPy-User] Signal to noise ratio
Wed Mar 3 21:17:46 CST 2010
I just tried Warren's example and it works on Ubuntu.
On 3 March 2010 21:20, Ariel Rokem <firstname.lastname@example.org> wrote:
> Hi Warren,
> thanks for this example!
> I am getting the following error:
> 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?
> On Wed, Feb 24, 2010 at 7:51 AM, Warren Weckesser <
> email@example.com> wrote:
>> Nils Wagner wrote:
>> > 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 ?
>> I posted an example low-pass filtering using 'butter' and 'lfilter' from
>> scipy.signal here:
>> > How can I eliminate noise from the signal ?
>> > Nils
>> > _______________________________________________
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> Ariel Rokem
> Helen Wills Neuroscience Institute
> University of California, Berkeley
> SciPy-User mailing list
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