def almost_none() -> mf.MembershipFunction:
"""
Returns:
mf.TrapezoidMembershipFunction
"""
almost_none = mf.TrapezoidMembershipFunction(0, 0, 0.05, 0.30)
almost_none.name = 'almost none'
return almost_none
def many() -> mf.MembershipFunction:
"""
Returns:
mf.TriangularMembershipFunction
"""
many = mf.TriangularMembershipFunction(0.50, 0.70, 0.90)
many.name = 'many'
return many
def most() -> mf.MembershipFunction:
"""
Returns:
mf.TrapezoidMembershipFunction
"""
most = mf.TrapezoidMembershipFunction(0.70, 0.90, 1, 1)
most.name = 'most'
return most
def few() -> mf.MembershipFunction:
"""
Returns:
mf.TriangularMembershipFunction
"""
few = mf.TriangularMembershipFunction(0.05, 0.30, 0.50)
few.name = 'few'
return few
def some() -> mf.MembershipFunction:
"""
Returns:
mf.TriangularMembershipFunction
"""
some = mf.TriangularMembershipFunction(0.30, 0.50, 0.70)
some.name = 'some'
return some
def get_membership_functions(self):
result = {}
start, end, points = self.start, self.end, self.points
n = len(points)
for i in range(n):
if i == 0:
cur = mf.TrapezoidMembershipFunction(start, start, points[0],
points[1])
elif i + 1 == n:
cur = mf.TrapezoidMembershipFunction(points[i - 1], points[i],
end, end)
else:
cur = mf.TriangularMembershipFunction(points[i - 1], points[i],
points[i + 1])
cur.name = self.aliases[i]
result[self.aliases[i]] = cur
return result
class TestRangeExtraction(unittest.TestCase):
triangle_mf = mf.TriangularMembershipFunction(0, 10, 20)
trap_mf = mf.TrapezoidMembershipFunction(0, 10, 20, 30)
def test_triangle(self):
l, r = self.triangle_mf.extract_range(0.5)
self.assertAlmostEqual(5, l)
self.assertAlmostEqual(15, r)
def test_trapezoid(self):
l, r = self.trap_mf.extract_range(0.5)
self.assertAlmostEqual(5, l)
self.assertAlmostEqual(25, r)
def test_trapezoid_with_very(self):
modifiers = dict_modifiers()
very = modifiers['very']
self.trap_mf.set_modifier(very)
l, r = self.trap_mf.extract_range(0.5)
print('very', l, r)
self.assertAlmostEqual(7.071067804794407, l)
self.assertAlmostEqual(22.928932195205594, r)
self.trap_mf.set_modifier(None)
def almost_none(self) -> mf.MembershipFunction:
return mf.TrapezoidMembershipFunction(self.min, self.min,
self._point(0.05),
self._point(0.30))
def most(self) -> mf.MembershipFunction:
return mf.TrapezoidMembershipFunction(self._point(0.70),
self._point(0.90), self.max,
self.max)
def many(self) -> mf.MembershipFunction:
return mf.TriangularMembershipFunction(self._point(0.50),
self._point(0.70),
self._point(0.90))
def some(self) -> mf.MembershipFunction:
return mf.TriangularMembershipFunction(self._point(0.30),
self._point(0.50),
self._point(0.70))
def few(self) -> mf.MembershipFunction:
return mf.TriangularMembershipFunction(self._point(0.05),
self._point(0.30),
self._point(0.50))