# coding=utf-8
"""
Created on 18 January 2014
@author: Cenk Bircanoglu
"""
import operator
from similarityPy.measure.similarity_measure import SimilarityMeasure
from similarityPy.measure.similarity_measure_type import SimilarityMeasureType
[docs]class DiceDissimilarity(SimilarityMeasure):
similarity_measure_type = SimilarityMeasureType.DISSIMILARITY_ABBR
def _algorithm(self):
if len(self._data) == 2:
point_a = self._data[0]
point_b = self._data[1]
if len(point_a) == len(point_b):
and_list = map(operator.and_, point_b, point_a)
xor_list = map(operator.xor, point_b, point_a)
and_count = and_list.count(True)
xor_count = xor_list.count(True)
try:
self._result = (float(xor_count) / (xor_count + (2 * and_count)))
except:
raise
else:
raise ArithmeticError("You cant calculate dice dissimilarity of array has different sizes.")
else:
raise ArithmeticError("You must enter two array to find squared euclidean distance.")