fuzzy-systems 0.3.0

A fuzzy system for python with fuzzy reasoning and classification.

Fuzzy system

Just a other python fuzzy rule-based system and reasoning package. Based on the lecture's given by Ning Xiong at Märlardalens University. Writen and implmented by @byteofsoren.

Installation.

pip install fuzzy_system

Basic usage

Assume that intended system for opening a valve dependent on price of electricity and the temperature in the environment.

Assume that the fuzzy set for the temperature and cost looks like this: This is implemented like this in this module:

>>> import python_fuzzy_system as fuzzy

>>> cold = fuzzy.fuzzy_member_pointlist([[-5,1],[5,0]])
>>> warm = fuzzy.fuzzy_member_pointlist([[0,0],[5,1],[10,1],[15,0]])
>>> hot = fuzzy.fuzzy_member_pointlist([[5,0],[15,1]])

>>> cheap = fuzzy.fuzzy_member_pointlist([[8,1],[12,0]])
>>> good = fuzzy.fuzzy_member_pointlist([[8,0],[12,1],[16,0]])
>>> expensive = fuzzy.fuzzy_member_pointlist([[12,0],[16,1]])

Now fire each individual member can be done like:

>>> cold.fire(1.5)
0.35

Creating rules for the system

Lets define a set of rules called Rn.

Rule	Condition	Do
R1	If Cheap AND Cold	Then Open
R2	If Hot AND (Cheep OR good)	Then HalfOpen
R3	If Expensive AND Hot	Then Closed

r1 = cheep*cold
r2 = hot*(cheep + good)
r3 = expensive*hot