def CalculateDOM(self, value):
"""
This method calculates the degree of membership for a particular value
:param value:
:return:
"""
# Test for the case where the left or right offsets are zero
# (to prevent divide by zero errors below)
if (Utils.IsEqual(self._rightOffset, 0.0) and (Utils.IsEqual(self._peakPoint, value))) or \
(Utils.IsEqual(self._leftOffset, 0.0) and (Utils.IsEqual(self._peakPoint, value))):
return 1.0
# Find DOM if left of center
elif (value <= self._peakPoint) and (value > (self._peakPoint - self._leftOffset)):
grad = 1.0 / self._leftOffset
return grad * (value - (self._peakPoint - self._leftOffset))
# Find DOM if right of center and less than center + right offset
elif (value > self._peakPoint) and (value <= self._peakPoint + self._rightOffset):
return 1.0
# out of range of this FLV, return zero
else:
return 0.0
def test_SpecifyThatDecimalValuesCanBeCompared(self):
value = 1.23456789
self.assertEqual(Utils.IsEqual(value, value + Utils.EPSILON / 2), True)
self.assertEqual(Utils.IsEqual(value, value + Utils.EPSILON * 2),
False)