title: Convert string array to cell
body: <p>I need to output a cell to an excel file.  Before this I need to convert a date column of integers to datestrings.  I know how to do this, but I am not able to put this new string array back into the cell - </p>
  
  <pre><code>mycell = { 'AIR' [780] [1] [734472] [0.01] ; ...
             'ABC' [780] [1] [734472] [0.02]}
  </code></pre>
  
  <p>I did this --> </p>
  
  <pre><code>dates = datestr(cell2mat(mycell(:,4))) ;
  </code></pre>
  
  <p>What I need as an answer is: </p>
  
  <pre><code>{'AIR' [780] [1] '14-Dec-2010' [0.01] ;
   'ABC' [780] [1] '23-Dec-2010' [0.03] ; }
  </code></pre>
  
  <p>so that I can now send it to an excel file using xlswrite.m</p>