class_docstr: Binary confusion matrix class
docstr: true negative (TN)
  eqv. with correct rejection
docstr_tok: ["true","negative","(","TN",")","eqv",".","with","correct","rejection"]
code: def TN(self):
      """
      true negative (TN)
      eqv. with correct rejection
      """
      return self._df_confusion.loc[
          self._class(False), self._class(False)
      ]
  
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 15 for calling the BinaryConfusionMatrix obj's underlying member method code with example usage: obj.TN() and returns: self