title: numpy.minimum for complex numbers
body: <p>numpy.minimum does not seem to work for complex numbers:</p>
  
  <pre><code>np.minimum(5+3*1j,4+30*1j)
  (4+30j)
  </code></pre>
  
  <p>I want to keep the value with the maximum magnitude.
  It only compares the real part.  Any other function for elementwise minimum comparison? MATLAB min does work with complex numbers.
  Thanks</p>