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A fuzzy system for python with fuzzy reasoning and classification.

Project description

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: Temperature Electricity cost 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

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