MATLAB cell array

Accessing cell array : {}-for getting array, () - for elem of this array

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carray{i}
carray{i}(elemIndex)

example : access cell array and string compare

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for i=1:totSample % ID
   
    for j=1:totRepeat
       
        a =( promoter_ID{1}(i) ) ;  % check the first column cell array
        b = ( promoter_repeat{1}(j) ); % check the first column cell array
        
        if strcmp(a,b) % yes it overlaps with some repeat
          display('yes')    
        else
          display('no')
        end    
 
    end
end