[Eeglablist] add events to the EEG data

[Makoto Miyakoshi]

Dear James,

By the way, I tried hard to come up with a trick to spare the for loop. See
my code below. I mean, what is this?? But it works like a charm.

    % extract event labels and time stamps
    allEventLabels = mobilab.allStreams.item{eventStreanIdx}.event.label;
    eventTimeStamp = mobilab.allStreams.item{eventStreanIdx}.timeStamp; %
in second

    % import event markers and latency to EEG.event
    allEventLatency = num2cell((eventTimeStamp-EEG.urxmin)*1000);
    allUrevent      = num2cell(1:length(allEventLatency));
    EEG.event = struct('type', {}, 'latency',{}, 'urevent',{});
    [EEG.event(1,1:length(allEventLabels)).latency] = allEventLatency{:};
    [EEG.event(1,1:length(allEventLabels)).type]    = allEventLabels{:};
    [EEG.event(1,1:length(allEventLabels)).urevent] = allUrevent{:};
    EEG = eeg_checkset(EEG,'eventconsistency');

This is also a convenient trick which I often use.

allEvent = {EEG.event.type}';
targetIdx = find(strcmp(allEvent, 'target'));
targetLatency = allEvent(targetIdx).latency;

Makoto

On Fri, Feb 6, 2015 at 6:19 AM, James Desjardins <jdesjardins at brocku.ca>
wrote:

>  Hi Karlo,
>
> Once you load a data set, executing the following script at the command
> line should add the events that you are looking for...
>
> %Get the latencies (data point indices) for all 'A' type events...
> A_latencies=[EEG.event(find(strcmp('A',{EEG.event.type}))).latency];
>
> %for each A_latencies add a new event type '1' with a latency of
> (A_latencies(i)+1.5*EEG.srate)-1...
> for i=1:length(A_latencies);
>     n_events=length(EEG.event);
>     EEG.event(n_events+1).type='1';
>     EEG.event(n_events+1).latency=(A_latencies(i)+1.5*EEG.srate)-1;
>     EEG.event(n_events+1).urevent=n_events+1;
> end
>
> %check for consistency and reorder the events chronologically...
> EEG=eeg_checkset(EEG,'eventconsistency');
>
>
>  James
>   ------------------------------
> *From:* eeglablist-bounces at sccn.ucsd.edu [eeglablist-bounces at sccn.ucsd.edu]
> on behalf of karlo gonzales [thats_karlo at yahoo.com]
> *Sent:* February 5, 2015 5:16 PM
> *To:* EEGLAB List
> *Subject:* [Eeglablist] add events to the EEG data
>
>   Hi,
>
>  We have an EEG data  with several events, which marked as 'A' and
> repeated every 5 sec.
> what i am looking for is a way to add extra events to the data such as
>  event '1' and appears 1.5 sec after event 'A'.
>
>  i am looking forward to hear from you.
>
>  Thanks in advance,
> Karlo
>
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-- 
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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