How to cut EEG signal?

My EEG recording is 300sec.. how to extract from 180sec to 240sec ?

Answer 1

[Azzi Abdelmalek]

If s is your signal

n=numel(s);
n1=fix(180*n/300);  
n2=fix(240*n/300);
out=s(n1:n2)

[Vaishali Harsulkar]

Thank you for this solution. It is working.

[Nikki Larsen]

what do i do if I have floating numbers for time for example instead of 180s what if i have 0.45673s but my total time is 300s? I tried the code above but it did not work,the 'out' was empty.

Your help would be very much appreciated.

Answer 2

[Daisy Das]

data = importdata("filename.mat");    %enter the filename manually

Error using importdata
Unable to open file.

fs = 256;     % sampling frequency of the signal (enter manually)
start = 180;
endd = 240;
out_row = data(:, start*fs:endd*fs);    % if each row represents one channel
out_col = data(start*fs:endd*fs, :);    % if each column represents one channel