Practical Neural Network Recipies in C++

Fuzzy Data and

Processing

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Defuzzification

Sometimes fuzziness just is not good enough. We need a crisp number.

A valve actuator cannot be expected to understand a fuzzy member-

ship function such as that in graph 3b of Figure

17.13.

It needs to

know in numerical terms how much to open the valve. The process of

selecting a single optimal point from the domain of a fuzzy member-

ship function is called defuzzification.

Before attempting to defuzzify or otherwise use a fuzzy

resultant, we should try to ascertain its validity. Perhaps the rule

base and/or primitive membership functions are less than excellent.

A good quick-and-dirty indicato