title: Matlab column multiplication of a matrix
body: <p>How can I multiply columns of a matrix and obtain a column vector.</p>
  
  <p>Example:
  A =</p>
  
  <pre><code> 1     1     4
   3     2     2
   2     1     1
   4     1     1
  </code></pre>
  
  <p>Expected output:
  C =</p>
  
  <pre><code> 4
  12
   2
   4
  </code></pre>
  
  <p>Any ideas without for?</p>