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For more information about this area, please contact:

Russ Tronstad
Extension Economist

Phone: (520) 621-2425



An Example Fuzzy Expert System

Step 6 -- Defuzzification

To determine exactly how much feed to use we need to defuzzify the rules. To do this we first combine the results from all rules into the outcome fuzzy set and then transform this composited fuzzy set to a crisp number.
centroid = N[Integrate[fud[x] x,{x,0,10}]/5]

The above approach does not work due to the nature of the composited fuzzy set. Instead a numerical approach must be used. The details are in the mathematica notebook.

For observation 3 the centroid of the outcome fuzzy set is 7.3.





Step 5

Return to the Fuzzy Expert System

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2011 Dept. of Agricultural & Resource Economics, The University of Arizona
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Last updated September 17, 1999
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