[FieldTrip] more on artfifact rejection

Michael Wibral michael.wibral at web.de
Mon Jan 24 11:48:47 CET 2011

Hi Jan-Mathijs,

I am a bit unsure how to proceed:

(1) sketch the artifact correction way like this
ft-definetrial -> artifact.XXX.YYY -> ft_rejectartifact -> ft_preprocessing
(2) ft-definetrial -> ft_preprocessing (with cfg.padding) -> artifact.XXX.YYY -> ft_rejectartifact(cfg, data) -> ft_preprocessing.

I think I should go for option (1) as this seems to be the standard use on continuous data. Sometime in the futrure one should then add a tutorial for those that have data in trials to start with.


-----Urspr√ľngliche Nachricht-----
Von: "jan-mathijs schoffelen" <jan.schoffelen at donders.ru.nl>
Gesendet: Jan 21, 2011 9:55:48 AM
An: "Email discussion list for the FieldTrip project" <fieldtrip at donders.ru.nl>
Betreff: Re: [FieldTrip] more on artfifact rejection

>Dear Michael,
>Yes, I agree with you here as well. In principle the  
>ft_artifact_zvalue supports data as a second input argument, but in  
>such case the different types of padding in the cfg do not make sense.  
>I would indeed remove the second input arguments in the example code  
>snippets. Could I ask you to take care of that?
>On Jan 20, 2011, at 10:51 AM, Michael Wibral wrote:
>> Deal Fieldtrip users,
>> there is something else I do not understand in the tutorial: if you  
>> read in the data in trials (as it is done) how can you do padding  
>> later as it is suggested. I tried to run the example code on teh  
>> website  reading in the data such that it contains trials. If I then  
>> try to search for muscle artifacts I get the 'subscript indices must  
>> be positive or logical ... values', indicating that the code tries  
>> to access data that aren't there. If I set the padding to zero  
>> (instead of 0.1) it works. So I am wondering wether somehow one  
>> should actually run these things on continuous data (contrary to  
>> what is indicated in the tutorial)?
>> Michael
>> <Michael Wibral.vcf><Michael  
>> Wibral.vcf>_______________________________________________
>> fieldtrip mailing list
>> fieldtrip at donders.ru.nl
>> http://mailman.science.ru.nl/mailman/listinfo/fieldtrip
>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: 0031-24-3614793
>fieldtrip mailing list
>fieldtrip at donders.ru.nl
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