[FieldTrip] Band Limited Power Analysis in Fieldtrip?

jan-mathijs schoffelen jan.schoffelen at donders.ru.nl
Mon Mar 3 09:42:19 CET 2014

Dear Ian,
The implementation of different filter types is a recurring issue, and we have it on our radar. I suggest you sign up on our bugzilla.fcdonders.nl bug-tracking system and add yourself in the CC for the following bugs: 2453 and 1981. That way you can see what is going on in this direction, and you may even contribute to their swift resolution ;-). As a side note, we try to avoid dependencies on the mathworks toolboxes (such as the signal processing toolbox, stats and image processing) because it allows for broader applicability of the code. In fact, for much of the filtering code we use open source drop in replacement code that has exactly the same functionality as the mathworks version of it.


On Feb 26, 2014, at 2:43 PM, Ian M. Andolina wrote:

> On 25/02/2014 11:51, fieldtrip-request at science.ru.nl wrote:
>> Re: [FieldTrip] Band Limited Power Analysis in Fieldtrip?
> Thanks Chaitanya, I get instability for the 1-4Hz band using a 4th order butterworth, but it seems to work for the higher bands (using cfg.bpinstabilityfix = 'reduce' to fix it only for the bands that need it). 
> Does anyone know if integrating a chebyshev type-1 filter into fieldtrip preprocessing has been attempted, it is present in the signal processing toolbox and I could do this manually but I'd rather use existing code if possible...
> Thanks again, Ian
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Jan-Mathijs Schoffelen, MD PhD 

Donders Institute for Brain, Cognition and Behaviour, 
Centre for Cognitive Neuroimaging,
Radboud University Nijmegen, The Netherlands

Max Planck Institute for Psycholinguistics,
Nijmegen, The Netherlands

J.Schoffelen at donders.ru.nl
Telephone: +31-24-3614793


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