MATLAB: How to insert awgn noise in the eeg signal

MATLAB

I have downloaded a file of .mat type and imported it in matlab, now I want to add noise in that eeg signal.
>fs = 512
  >T = 1/fs; % sampling rate or frequency;
  >N =length(EEGsig);
  >ls = size(EEGsig); % find the length of the data per second
  >tx =[0:length(EEGsig)-1]/fs;
  >fx = fs*(0:N/2-1)/N;
  >figure; subplot (211), plot(tx,EEGsig); xlabel('Time (s)'), 
  >ylabel('Amplitude (uV)'), title('Original EEG signal');  %EEG waveform
  >subplot(212), plot(tx,EEGsig);
  >xlabel('Time (s)'), ylabel('Amplitude (uV)'), title('Zoom into original EEG 
  signal at 1 to 2 seconds'), xlim([1,2]) ; % Used to zoom in on single ECG 
  waveformfigure

Best Answer

Read about awgn. There you got demo on how to add white Gaussian noise to given signal.
https://in.mathworks.com/help/comm/ref/awgn.html
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