title: Combining random forest models in scikit learn
body: <p>I have two RandomForestClassifier models, and I would like to combine them into one meta model. They were both trained using similar, but different, data. How can I do this?</p>
  
  <pre><code>rf1 #this is my first fitted RandomForestClassifier object, with 250 trees
  rf2 #this is my second fitted RandomForestClassifier object, also with 250 trees
  </code></pre>
  
  <p>I want to create <code>big_rf</code> with all trees combined into one 500 tree model</p>