code: def test_scatter_matrix(self):
      self.df.scatter_matrix(asFigure=True)
  
imports: import cufflinks
  import pandas
  import numpy
  import unittest
  from nose.tools import assert_equals
label_desc: Use image node_id 4 for calling the TestIPlot obj's underlying member method code with example usage: obj.test_scatter_matrix() without return types