title: Rserve: pyServe not able to call basic R functions
body: <p>I'm calling Rserve from python and it runs for basic operations, but not if I call basic functions as min</p>
  <pre><code>import pyRserve
  
  conn = pyRserve.connect()
  
  cars = [1, 2, 3]
  conn.r.x = cars
  print(conn.eval('x'))
  print(conn.eval('min(x)'))
  </code></pre>
  <p>The result is:</p>
  <pre><code>[1, 2, 3]
  Traceback (most recent call last):
    File &quot;test3.py&quot;, line 9, in &lt;module&gt;
      print(conn.eval('min(x)'))
    File &quot;C:\Users\acastro\.windows-build-tools\python27\lib\site-packages\pyRserve\rconn.py&quot;, line 78, in decoCheckIfClosed
      return func(self, *args, **kw)
    File &quot;C:\Users\acastro\.windows-build-tools\python27\lib\site-packages\pyRserve\rconn.py&quot;, line 191, in eval
      raise REvalError(errorMsg)
  pyRserve.rexceptions.REvalError: Error in min(x) : invalid 'type' (list) of argument
  </code></pre>
  <p>Do you know where is the problem?
  Thanks</p>