title: Quantile Regression with multiple independent variables?
body: <p>Is it possible to run a Quantile REgression using multiple independent variables (x).
  Using Python I tried statsmodel</p>
  <pre><code>mod = smf.quantreg(y, X)
  res = mod.fit(q=.5)
  print(res.summary())
  </code></pre>
  <p>Where y and X are Pandas dataframes. This works for OLS, however for quantile regression I does not.</p>
  <p>How would you go about performing this?</p>