[FieldTrip] question about re-doing analysis

[jan-mathijs schoffelen]

Hi Elli,

Yes, that's a good point. What I sometimes do, is to also store the mixing matrix which comes out after ft_componentanalysis (i.e. the comp.topo). When you have this matrix, you can very cheaply re-ICA-filter the data. Yet, note that with different filter settings in the preprocessing, the ICA-components (and topographies) may also change.


BW, JM



On Aug 8, 2011, at 8:58 PM, Kanal Eliezer wrote:

> Yes, that works... the only problem with this approach is that I'll have to redo ICA filtering.
> 
> I guess I was just curious if there's a different way that everyone uses that I'm not familiar with. This is the first dataset I've analyzed using fieldtrip, so I'm just trying to make sure I'm "doing it right". Thanks -
> 
> Elli
> 
> 
> On Aug 8, 2011, at 2:33 PM, jan-mathijs schoffelen wrote:
> 
>> Dear Elli,
>> 
>>> to load up each dataset, extract the "sampleinfo" field, pull that from the original raw file, apply any new filters, and then work with that. This would mitigate my needing to go through all the data and do the trial reject again (which would take weeks of work). Is there a better way to do this? 
>> 
>> Isn't this good enough, then ;-) ?
>> 
>> JM
>> 
>> 
>> 
>> Dr. J.M. (Jan-Mathijs) Schoffelen 
>> Donders Institute for Brain, Cognition and Behaviour, 
>> Centre for Cognitive Neuroimaging,
>> Radboud University Nijmegen, The Netherlands
>> J.Schoffelen at donders.ru.nl
>> Telephone: +31-24-3614793
>> 
>> 
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>> fieldtrip at donders.ru.nl
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> 
> 
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Dr. J.M. (Jan-Mathijs) Schoffelen 
Donders Institute for Brain, Cognition and Behaviour, 
Centre for Cognitive Neuroimaging,
Radboud University Nijmegen, The Netherlands
J.Schoffelen at donders.ru.nl
Telephone: +31-24-3614793