title: quantile regression error package AER
body: <p>I used data HousePrices from package AER for running quantile regression. first i created dummies for categorical variables. then i have run basic ols regression. this is my regression:</p>
  
  <pre><code>myreg1 &lt;- lm(price ~ lotsize + lotsize^2 + bed + bath + store + dummydrive +
               dummyrecreate + dummybase+ dummygas + dummyair + garage + dummypref)
  </code></pre>
  
  <p>then 
  <code>summary(myreg1)</code> and plotted.but when i tried to do quantile regression i did not get an error but got a warning message when used <code>summary(myqreg1)</code> command.</p>
  
  <pre><code> myqreg1&lt;-rq(price ~ lotsize + lotsize^2 + bed + bath + store + dummydrive +
               dummyrecreate + dummybase+ dummygas + dummyair + garage + dummypref)
  </code></pre>
  
  <p><code>summary(myqreg1)</code> </p>
  
  <p>then i included tau
  my regression:</p>
  
  <pre><code>qfit2 &lt;- rq(price ~ lotsize + lotsize^2 + bed + bath + store + dummydrive +
              dummyrecreate + dummybase+ dummygas + dummyair + garage + dummypref,
              tau=seq(0.1,0.9,by=0.1))
  </code></pre>
  
  <p>again got a warning message but now 4 warnings:</p>
  
  <p>i have searched a lot on the internet and could not find the answer.</p>