docstr: This functions calculates the markedness
  :return:
docstr_tok: ["This","functions","calculates","the","markedness",":","return",":"]
code: def markedness(self):
      """
      This functions calculates the markedness
      :return:
      """
      return (
          self.positive_predictive_values()
          + self.negative_predictive_values()
          - 1
      )
  
imports: from __future__ import absolute_import, print_function
  import numpy
  from scipy import ndimage
  from niftynet.utilities.util_common import MorphologyOps, CacheFunctionOutput
label_desc: Use image node_id 29 for calling the PairwiseMeasures obj's underlying member method code with example usage: obj.markedness() and returns: unknown