Jave example explained

This is a simple java code used to load a fuzzy inference system (FIS), this code available at net.sourceforge.jFuzzyLogic.TestTipper.java

• First load an FCL file, using FIS.load(fileName) function.
  

  String fileName = "fcl/tipper.fcl"; FIS fis = FIS.load(fileName,true);

• When an error is detected during FIS.load(), a null object is returned.

  if( fis == null ) { // Error while loading? System.err.println("Can't load file: '" + fileName + "'"); return; }

• Now we can plot the FIS. Actually, we plot each Variable in the FUNCTION_BLOCK (and each LinguisticTerm in each Variable). This might only be usefull when you are debugging your code.

  fis.chart();

  And we get the following images:

  

  

  

• Now we use the FIS. We start by setting FIS' inputs

  fis.setVariable("service", 3); fis.setVariable("food", 7);

• And we run the system

  fis.evaluate();

• If we want to know the system's output (in this case there's only one output variable 'tip')

  fis.getVariable("tip").getLatestDefuzzifiedValue();

• We can also plot output's defuzzifier (probably only during debuging)

  fis.getVariable("tip").chartDefuzzifier(true);

  

• And, of course, we can print the FIS

  System.out.println(fis);

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Author: Pablo Cingolani (pcingola@users.sourceforge.net)