[FieldTrip] Concatenate different size of trials into single one trial

Schoffelen, J.M. (Jan Mathijs) jan.schoffelen at donders.ru.nl
Sun Jul 1 20:16:00 CEST 2018

Hi Yadwinder,

Why would you want this?

For this purpose, ft_appenddata is not your friend, if you want to ‘create a single data matrix’. It concatenate a bunch of matrices, you can use cat(2,data.trial{:}), but this will only be a meaningful operation in a very limited number of cases. Most of the time, the last time point of trial n-1 will not be temporally aligned with the first time point of trial n, and even if that were the case, trial specific filtering, baseline correction, or any trial-specific processing in general will lead to discontinuities in the signals.

Best wishes,


On 30 Jun 2018, at 15:06, Yadwinder Kaur <yadwinder.kaur at stud.uni-greifswald.de<mailto:yadwinder.kaur at stud.uni-greifswald.de>> wrote:

Dear All

I have pre-processed my EEG data cutting into different trials (35 trials total) using fieldtrip , now I wish to concatenate them into one single data matrix. The length of each trial varies form each other.

ofcourse, ft_appenddata didn't work in this case.

I would highly appreciate any help to solve this issue.

Thanks in advance.

Yadwinder _______________________________________________
fieldtrip mailing list

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.science.ru.nl/pipermail/fieldtrip/attachments/20180701/5d6473ca/attachment.html>

More information about the fieldtrip mailing list