[Eeglablist] How to reduce the number of events in the EEG data

[Makoto Miyakoshi]

Dear Achint,

Stephen's reply is very important, you want to check what is wrong with
your data first.
I also had an experience of processing data with ~10k events. Loading this
data took me such a long time in my environment... but I did not see any
noticeable errors. I wonder if just having many number of events can cause
an error, I have never heard of the problem.

That being said, if you want to delete selective events, see this wiki page
first
https://sccn.ucsd.edu/wiki/Makoto's_useful_EEGLAB_code#How_to_change_event_type_names

% Rename event type name 'example1' into 'example2'
allEvents = {EEG.event.type}';
example1Idx = strcmp(allEvents, 'example1');
[EEG.event(example1Idx).type] = deal('example2');

Modify this code in the following way

% Delete events with type name 'stimulusX'
allEvents = {EEG.event.type}';
example1Idx = strcmp(allEvents, 'stimulusX');
EEG.event(example1Idx = [];

This code is to delete all the events whose name is 'stimulusX'. You can
use this solution to test your hypothesis: too many events should cause the
error. Let us know what happens.

Makoto

On Tue, Jul 24, 2018 at 7:38 AM Achint Sharma <achint.s at cbcs.ac.in> wrote:

> Hi Chris
> My EEG data has slightly higher number of events as compared to the events
> recorded in the behavioural data file. While importing events from the text
> file for renaming, it shows error pointing out the difference in the event
> numbers. How can I reduce length of EEG data? Or if there's any other
> solution to this problem.
> Thanks
> Achint
> _______________________________________________
> Eeglablist page: http://sccn.ucsd.edu/eeglab/eeglabmail.html
> To unsubscribe, send an empty email to
> eeglablist-unsubscribe at sccn.ucsd.edu
> For digest mode, send an email with the subject "set digest mime" to
> eeglablist-request at sccn.ucsd.edu



-- 
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://sccn.ucsd.edu/pipermail/eeglablist/attachments/20180731/b539bea8/attachment.html>