title: From matrix column subtract corresponding vector value
body: <p>I have a matrix 'x' and a row vector 'v'; the number of elements in the row vector is the same as the number of columns in the matrix. Is there any predefined function for doing the following operation?</p>
  
  <pre><code>for c = 1 : columns(x)
      for r = 1 : rows(x)
          x(r, c) -= v(c);
      end
  end
  </code></pre>