title: Matlab: How to random shuffle columns of matrix
body: <p>I have a matrix like:</p>
  
  <pre><code> A=
      4 7 8 9
      3 3 5 7
      6 4 8 6
  </code></pre>
  
  <p>and wants to random shuffle columns and do it something like: </p>
  
  <pre><code> A=
      8 4 9 7
      5 3 7 3
      8 6 6 4
  </code></pre>
  
  <p>does anyone have any idea?</p>