title: Setting x-axis limits using plotyy; data disappears
body: <p>I'm using plotyy to plot two datasets with the same x values over two different y scales. It all works perfectly, until I try to change the limits of the x-axis. (Matlab plots a lot of extra space on both sides.) Whenever I add in 'set(AX(1) xlim', the lines associated with that axis disappear and the plot appears blank. </p>
  
  <p>My code:</p>
  
  <pre><code>[AX,h1,h2]=plotyy(datenum(DateVector),data1,datenum(DateVector),data2);
  dateFormat = 10;
  datetick(AX(1),'x',dateFormat);  
  datetick(AX(2),'x',dateFormat); 
  set(AX(1),'XLim',[1950 2013]);  
  set(AX(2),'xlim',[1950 2013]); 
  xlabel('Year') 
  ylabel('Data1');  
  ylabel('Data2');
  </code></pre>
  
  <p>Thanks!</p>