MATLAB: I have two cell arrays ‘A’ and ‘B’, each with only numeric values for only the first columns, I want to compare all elements of the first column of A with each element of the first column of B.

Question

My code is the one below, it is not doing the comparison:

 for r=1:6
    for c=1:2
        if((A(r,1)==B(c,1)))
           x(r,1)="equal";
        end
    end      
 end

Answer 1

Sort of close, but try using isequal() instead of ==.

Try this:

% Make up A and B because poster forgot to upload them.
% Guess, and just make them random integers.
rows = 1000;
columns = 3;
A = cell(rows, columns);
for row = 1 : rows
  for col = 1 : columns
    A{row, col} = randi(5, 1, 3);
    B{row, col} = randi(5, 1, 3);
  end
end
% Now we have A and B cell arrays and we can begin.
% Get size of A.
[rows, columns] = size(A);
% Assume B is the same size as A.
% Make cell array for strings saying if the
% corresponding cells are equal or not.
equality = cell(rows, columns);
% Compare every cell in the cell array for equality with the isequal() function.
for row = 1 : rows
  for col = 1 : columns
    if isequal(A(row, col), B(row, col))
      % A and B are equal for this cell location.
      equality{row, col} = 'equal';
    else
      % A and B are NOT equal for this cell location.
      equality{row, col} = 'not equal';
    end
  end
end
% Print to command window
equality