title: PCA Analysis in PySpark
body: <p>Looking at <a href="http://spark.apache.org/docs/latest/mllib-dimensionality-reduction.html" rel="noreferrer">http://spark.apache.org/docs/latest/mllib-dimensionality-reduction.html</a>. The examples seem to only contain Java and Scala. </p>
  
  <p>Does Spark MLlib support PCA analysis for Python? If so please point me to an example. If not, how to combine Spark with scikit-learn?</p>