# Simplifiing the MATLAB code

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Rene Sebena on 4 Nov 2016
Commented: Rene Sebena on 4 Nov 2016
Hi there, I know this is something simple, but I am quite new in matlab and will aprreciate your help with this issue,
I know order of specific events in one dimension matrix:
e1 = [1,19,24]; % order of specific condition in matrix;
e2 = [2,8,27];
e3 = [4,16,23];
I have data with the same event type and I need to change event.type based on information above, so that:
EEG.event(1,1).type = 1;EEG.event(1,19).type = 1;EEG.event(1,24).type = 1;
EEG.event(1,2).type = 2;EEG.event(1,8).type = 2;EEG.event(1,27).type = 2;
EEG.event(1,4).type = 3;EEG.event(1,16).type = 3;EEG.event(1,23).type = 3;
How can I do it in simple way?
Thank you very much for your time and help!

Image Analyst on 4 Nov 2016
Would you like a for loop? This could be simpler if the e vectors were much long than 3 elements
for k = 1 : length(e1)
EEG.event(1,e1(k)).type = 1;
EEG.event(1,e2(k)).type = 2;
EEG.event(1,e3(k)).type = 3;
end
If e1, e2, and e3 don't all have the same length then you're best off using 3 separate for loops.
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Rene Sebena on 4 Nov 2016
Thank you, this helped a lot!

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