title: sort vs sortrows in Matlab
body: <p>Is it possible to achieve the same functionality with sort function than using sortrows.  My matrix has over 4million+ rows and sortrows is bringing in a lot of latency because of iterations. (a vectorizated approach would be appreciated)</p>
  
  <pre><code>%Col1 -&gt; date, Col2 -&gt; id, Col3 -&gt; ranking within each date-group (to help you debug)
  data = [ ...
         734614 5 3; 734615 6 5; 734622 1 1; 734615 1 1; 734615 4 3; 
         734622 2 2; 734622 4 3;   734615 3 2; 734615 5 4; 734614 3 2; 
         734614 1 1; 734622 8 4; 734622 9 5;] ;
  
  sortedanswer = 
    734614           1           1
    734614           3           2
    734614           5           3
    734615           1           1
    734615           3           2
    734615           4           3
    734615           5           4
    734615           6           5
    734622           1           1
    734622           2           2
    734622           4           3
    734622           8           4
    734622           9           5
  </code></pre>
  
  <p>Thanks!</p>