title: GNU Octave, round a number to units precision
body: <p>In GNU Octave version 3.4.3 I want to round a matrix to 2 units precision on the contents of a matrix like this.</p>
  
  <pre><code>mymatrix=[1.1234567, 2.12345; 3.1234567891, 4.1234];
  disp(mymatrix);
  </code></pre>
  
  <p>This prints:</p>
  
  <pre><code>1.1235   2.1235
  3.1235   4.1234
  </code></pre>
  
  <p>As you can see, the disp forces the precision to '5', I want the units precision to be 2.  How do I do this?</p>