def testNmfRun(self):
self.factor = factorization(self.V, 4)
self.estimate = dot(self.factor["basis"], self.factor["coef"])
print self.estimate
self.error = self.estimate - self.V
def init_factorization(self, rank = 4):
print "start factorization"
self.factor = factorization(self.sparse, rank=rank)
print "factorization finished"