title: How do I convert a 2X2 matrix to 4X4 matrix in MATLAB?
body: <p>I need some help in converting a 2X2 matrix to a 4X4 matrix in the following manner:</p>
  
  <pre><code>A = [2 6;
       8 4]
  </code></pre>
  
  <p>should become:</p>
  
  <pre><code>B = [2 2 6 6;
       2 2 6 6;
       8 8 4 4;
       8 8 4 4]
  </code></pre>
  
  <p>How would I do this?</p>