title: pandas.rpy.common.load_data() usage/documentation?
body: <p>I am trying to convert some <code>&lt;class 'rpy2.robjects.vectors.Matrix'&gt;</code> variables into Pandas dataframes.</p>
  
  <p>There is a lot of copy-paste instructions of how to do so on the internet, all giving the brief example:</p>
  
  <pre><code>pandas.rpy.common.load_data("infert")
  </code></pre>
  
  <p>without any information on where <code>"infert"</code> is coming from. 
  I was unable to get any sort of documentation on this function (why is there none?), but apparently I cannot use it:</p>
  
  <pre><code>summary= r.summary(linear_model)
  filtered_summary=summary.rx2("tTable")
  print com.load_data("filtered_summary")
  </code></pre>
  
  <p>gives me: </p>
  
  <pre><code>---------------------------------------------------------------------------
  LookupError                               Traceback (most recent call last)
  &lt;ipython-input-68-a087eddd5220&gt; in &lt;module&gt;()
        8 #print test1_sum.names
        9 print type(r_res)
  ---&gt; 10 print com.load_data("filtered_summary")
       11 #print pd.DataFrame(test1_sum.rx2("tTable"))
       12 
  
  /usr/lib64/python2.7/site-packages/pandas/rpy/common.pyc in load_data(name, package, convert)
       29     r.data(name)
       30 
  ---&gt; 31     robj = r[name]
       32 
       33     if convert:
  
  /usr/lib64/python2.7/site-packages/rpy2/robjects/__init__.pyc in __getitem__(self, item)
      226 
      227     def __getitem__(self, item):
  --&gt; 228         res = _globalenv.get(item)
      229         res = conversion.ri2ro(res)
      230         res.__rname__ = item
  
  LookupError: 'filtered_summary' not found
  </code></pre>
  
  <p>while:</p>
  
  <pre><code>summary= r.summary(linear_model)
  print com.load_data("summary")
  </code></pre>
  
  <p>gives me: </p>
  
  <pre><code>---------------------------------------------------------------------------
  TypeError                                 Traceback (most recent call last)
  &lt;ipython-input-69-b51722281aa4&gt; in &lt;module&gt;()
        8 #print test1_sum.names
        9 print type(r_res)
  ---&gt; 10 print com.load_data("summary")
       11 #print pd.DataFrame(test1_sum.rx2("tTable"))
       12 
  
  /usr/lib64/python2.7/site-packages/pandas/rpy/common.pyc in load_data(name, package, convert)
       32 
       33     if convert:
  ---&gt; 34         return convert_robj(robj)
       35     else:
       36         return robj
  
  /usr/lib64/python2.7/site-packages/pandas/rpy/common.pyc in convert_robj(obj, use_pandas)
      222             return converter(obj)
      223 
  --&gt; 224     raise TypeError('Do not know what to do with %s object' % type(obj))
      225 
      226 
  
  TypeError: Do not know what to do with &lt;class 'rpy2.robjects.functions.SignatureTranslatedFunction'&gt; object
  </code></pre>
  
  <p>So:</p>
  
  <ul>
  <li>How do I use <code>load_data</code> correctly</li>
  <li>How can I best get my R matrix converted to a Pandas DataFrame?</li>
  </ul>