[FieldTrip] define trials from multiple datasets

[Arjen Stolk]

Hi Max,

See these pages and judge for yourself:
http://www.fieldtriptoolbox.org/example/getting_started_with_reading_raw_eeg_or_meg_data
http://www.fieldtriptoolbox.org/example/making_your_own_trialfun_for_conditional_trial_definition

If your trials are defined as x1 time before a certain trigger until x2
time after, it's very easy. If it's slightly more complicated, then check
that second page. In short, the idea there is to make ft_definetrial call a
tailormade trial function (cfg.trialfun). The good news is that if the
triggers and trials are the same for each subject, you only have to make
one function.

Hope that gets you started,
Arjen

2016-02-10 16:03 GMT-08:00 Max Cantor <Max.Cantor at colorado.edu>:

> Hi fieldtrip community,
>
> I'm trying to use ft_definetrial to create a trial definition from 8
> datasets, recorded back-to-back from a subject, and then use
> ft_redefinetrial with that trial definition and raw data that was
> concatenated in eeglab and converted to a fieldtrip structure using
> eeglab2fieldtrip. Is this feasible in a relatively straightforward way, or
> would I be better off doing the epoching in eeglab as well before
> converting back to fieldtrip?
>
> On a side note, I chose to concatenate the data in eeglab because I could
> not figure out a convenient way to do so in fieldtrip. I know there is
> ft_appenddata, but as best as I can tell this is meant to be used after
> epoching, and the sample information was not being concatenated (or at
> least not properly), which was creating problems down the line with
> artifact rejection in my pipeline. Maybe there was some other way to do
> this properly in fieldtrip that I had not considered in the first place.
>
> Best,
>
> Max
>
> --
> Max Cantor
> Graduate Student
> Cognitive Neuroscience of Language Lab
> University of Colorado Boulder
>
> _______________________________________________
> fieldtrip mailing list
> fieldtrip at donders.ru.nl
> http://mailman.science.ru.nl/mailman/listinfo/fieldtrip
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.science.ru.nl/pipermail/fieldtrip/attachments/20160210/67f0dcc9/attachment-0002.html>