title: ImportError: No module named sklearn.cluster in dbscan example
body: <p>on Ubuntu 16.04 with Anaconda python 2.7, attempting <a href="http://scikit-learn.org/stable/auto_examples/cluster/plot_dbscan.html" rel="nofollow noreferrer">http://scikit-learn.org/stable/auto_examples/cluster/plot_dbscan.html</a>.  Getting import error: ImportError: No module named sklearn.cluster.  This is from the example code line: from sklearn.cluster import DBSCAN.</p>
  
  <p>I have scikit-learn installed via conda and all appears to be correct. </p>
  
  <p>Any assistance would be greatly appreciated.</p>
  
  <p>thanks </p>