title: pyspark: Convert sparse local matrix to an RDD
body: <p>I have a sparse matrix (which I receive from a python function) which I want to convert to a numpy matrix. The numpy matrix will not fit in the local RAM and I want to covet it into an RDD in pySpark. I am not tha familiar with Spark in general and so I do not know how to load a local spase matrix into an RDD.</p>