title: MATLAB-Undefined function or method 'mtimes' for input arguments of type 'cell'
body: <p>I'm trying to make a table in GUI. This table must be filled in by the user. When I want to edit the inserted data in an M-file, this error appeared.</p>
  
  <pre><code>??? Undefined function or method 'mtimes' for input arguments of type 'cell'.
  </code></pre>
  
  <p>I want to cross four columns and write the answer in the fifth column,
  Please help me to correct this problem.</p>