class_docstr: Binary confusion matrix class
docstr: test outcome negative
  TN + FN
docstr_tok: ["test","outcome","negative","TN","+","FN"]
code: def NegativeTest(self):
      """
      test outcome negative
      TN + FN
      """
      return self.TN + self.FN
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import math
  import numpy
  import pandas
  import collections
  from pandas_ml.confusion_matrix.abstract import ConfusionMatrixAbstract
label_desc: Use image node_id 19 for calling the BinaryConfusionMatrix obj's underlying member method code with example usage: obj.NegativeTest() and returns: unknown