title: Matlab: how to sort data descent excluding NaN
body: <p>Say I have a row:</p>
  
  <p><b>NaN</b> 29.99 30.00 <b>NaN</b> 24.32 <b>NaN</b> ...............</p>
  
  <p>How can I sort the data in descending order and select the top 10% largest number? </p>
  
  <p>The 'sort' function will put NaN as the "largest"~~~ how can I exclude it?</p>
  
  <p>Thanks!!</p>