Error Operand "OR" (Java)

[Unknown]

Hi Juan, thanks for this awesome work. I have created my fuzzy logic using fuzzylight and exported it for Java. When i try to use it on Java i keep getting the error:

[syntax error] logical operator <or> expects two operands, but found <3>

I have searched and found only one topic related to that. I´ve download some java files to correct it, but still get the same error. Is there any fix for this issue? Or i can replace those java files (Antecedent.java and Engine.java) on .jar and recompile it?

Bellow the code where I´m getting this error.

		RuleBlock ruleBlock = new RuleBlock();
		ruleBlock.setEnabled(true);
		ruleBlock.setName("Gases");
		ruleBlock.setConjunction(new AlgebraicProduct());
		ruleBlock.setDisjunction(new AlgebraicSum());
		ruleBlock.setActivation(new AlgebraicProduct());
		ruleBlock.addRule(Rule.parse("if C2H2_C2H4 is A and CH4_H2 is B and (C2H4_C2H6 is A or C2H4_C2H6 is B) then DIAGNOSTICO is D1", engine));
		ruleBlock.addRule(Rule.parse("if C2H2_C2H4 is A and CH4_H2 is B and C2H4_C2H6 is C then DIAGNOSTICO is D2", engine));
		ruleBlock.addRule(Rule.parse("if C2H2_C2H4 is A and (CH4_H2 is C or CH4_H2 is D) and (C2H4_C2H6 is A or C2H4_C2H6 is B ) then DIAGNOSTICO is D2N", engine));
		ruleBlock.addRule(Rule.parse("if C2H2_C2H4 is A and (CH4_H2 is C or CH4_H2 is D) and C2H4_C2H6 is C then DIAGNOSTICO is D3", engine));
		ruleBlock.addRule(Rule.parse("if C2H2_C2H4 is A and (CH4_H2 is C or CH4_H2 is D) and C2H4_C2H6 is D then DIAGNOSTICO is D4", engine));
		ruleBlock.addRule(Rule.parse("if C2H2_C2H4 is A and CH4_H2 is A and (C2H4_C2H6 is A or C2H4_C2H6 is B) then DIAGNOSTICO is D5", engine));
		ruleBlock.addRule(Rule.parse("if (C2H2_C2H4 is A or C2H2_C2H4 is B) and CH4_H2 is A and (C2H4_C2H6 is A or C2H4_C2H6 is B) then DIAGNOSTICO is D6", engine));
		ruleBlock.addRule(Rule.parse("if C2H2_C2H4 is not A and CH4_H2 is B and (C2H4_C2H6 is A or C2H4_C2H6 is B) then DIAGNOSTICO is D7", engine));
		ruleBlock.addRule(Rule.parse("if (C2H2_C2H4 is B or C2H2_C2H4 is C) and CH4_H2 is B and C2H4_C2H6 is D then DIAGNOSTICO is D8", engine));
		engine.addRuleBlock(ruleBlock);

[Unknown]

Juan, this code for those Java i´ve mentioned is not working for this last version of jfuzzylite.

This is the topic that i´ve found ..

Thanks.

[Juan Rada-Vilela (admin)]

Hi,

could you please comment all rules, and uncomment one by one until you find which rule is throwing the exception? There must be a problem with a rule not being correctly written.

Cheers.

[Unknown]

Juan, good night. Those using OR, if i comment, it works. The first one is not working. And it works on the program.This code has been export from QtFuzzyLite 5…it hasn´t been made manually. All those rules using OR get the same problem. If i put two simple rules instead the one using or it works.

For example:

ruleBlock.addRule(Rule.parse(“if C2H2_C2H4 is A and CH4_H2 is B and C2H4_C2H6 is A or C2H4_C2H6 is B) then DIAGNOSTICO is D1”, engine));

ruleBlock.addRule(Rule.parse(“if C2H2_C2H4 is A and CH4_H2 is B and C2H4_C2H6 is A then DIAGNOSTICO is D1”, engine));
ruleBlock.addRule(Rule.parse(“if C2H2_C2H4 is A and CH4_H2 is B and C2H4_C2H6 is B then DIAGNOSTICO is D1”, engine));

Thanks Juan.

[Juan Rada-Vilela (admin)]

Hi,

in Rule.parse(“if C2H2_C2H4 is A and CH4_H2 is B and C2H4_C2H6 is A or C2H4_C2H6 is B) then DIAGNOSTICO is D1 you have an unmatched parenthesis.

Are you using jfuzzylite-5.0?

[Unknown]

ruleBlock.addRule(Rule.parse("if C2H2_C2H4 is A and CH4_H2 is B and (C2H4_C2H6 is A or C2H4_C2H6 is B) then DIAGNOSTICO is D1", engine));

It was a ctrl + c and ctrl + v problem… the rule is shown.. this is the onde that is getting this error.
Sorry.. for bad copy and paste..

🙁

[Juan Rada-Vilela (admin)]

Hi,

could you post the FLL code of the engine? Are you using jfuzzylite version 5.0?

Meanwhile, could you try creating the rule proposition by proposition? That is,

ruleBlock.addRule(Rule.parse("if C2H2_C2H4 is A then DIAGNOSTICO is D1", engine));
ruleBlock.addRule(Rule.parse("if C2H2_C2H4 is A and CH4_H2 is B then DIAGNOSTICO is D1", engine));
ruleBlock.addRule(Rule.parse("if C2H2_C2H4 is A and CH4_H2 is B then DIAGNOSTICO is D1 and (C2H4_C2H6 is A)", engine));
ruleBlock.addRule(Rule.parse("if C2H2_C2H4 is A and CH4_H2 is B then DIAGNOSTICO is D1 and (C2H4_C2H6 is A or C2H4_C2H6 is B)", engine));

Once you know where it fails, make sure the variables and terms are written correctly. Once you find the error, I will revise how to provide a more meaningful description of the error.

[Unknown]

Yes, that is my next step.. writing proposition by proposition without using or..

Engine: P&D321
InputVariable: C2H2_C2H4
  enabled: true
  range: 0.000 6.000
  term: A Trapezoid 0.000 0.000 0.050 0.100
  term: B Trapezoid 0.050 0.100 0.975 1.000
  term: C Trapezoid 0.975 1.000 2.950 3.000
  term: D Ramp 2.950 3.000
InputVariable: CH4_H2
  enabled: true
  range: 0.000 6.000
  term: A Trapezoid 0.000 0.000 0.050 0.100
  term: B Trapezoid 0.050 0.100 0.950 1.000
  term: C Trapezoid 0.950 1.000 2.950 3.000
  term: D Ramp 2.950 3.000
InputVariable: C2H4_C2H6
  enabled: true
  range: 0.000 6.000
  term: A Trapezoid 0.000 0.000 0.050 0.100
  term: B Trapezoid 0.050 0.100 0.950 1.000
  term: C Trapezoid 0.950 1.000 2.950 3.000
  term: D Ramp 2.950 3.000
OutputVariable: DIAGNOSTICO
  enabled: true
  range: -0.050 9.000
  accumulation: Maximum
  defuzzifier: Centroid 250
  default: 8.000
  lock-previous: false
  lock-range: false
  term: D1 Trapezoid 0.000 0.000 0.500 1.000
  term: D2 Trapezoid 0.500 1.000 1.500 2.000
  term: D2N Trapezoid 1.500 2.000 2.500 3.000
  term: D3 Trapezoid 2.500 3.000 3.500 4.000
  term: D4 Trapezoid 3.500 4.000 4.500 5.000
  term: D5 Trapezoid 4.500 5.000 5.500 6.000
  term: D6 Trapezoid 5.500 6.000 6.500 7.000
  term: D7 Trapezoid 6.500 7.000 7.500 8.000
  term: D8 Ramp 7.500 8.000
RuleBlock: 1
  enabled: true
  conjunction: EinsteinProduct
  disjunction: AlgebraicSum
  activation: Minimum
  rule: if C2H2_C2H4 is A and CH4_H2 is B and (C2H4_C2H6 is A or C2H4_C2H6 is B) then DIAGNOSTICO is D1
  rule: if C2H2_C2H4 is A and CH4_H2 is B and C2H4_C2H6 is C then DIAGNOSTICO is D2
  rule: if C2H2_C2H4 is A and (CH4_H2 is C or CH4_H2 is D) and (C2H4_C2H6 is A or C2H4_C2H6 is B ) then DIAGNOSTICO is D2N
  rule: if C2H2_C2H4 is A and (CH4_H2 is C or CH4_H2 is D) and C2H4_C2H6 is C then DIAGNOSTICO is D3
  rule: if C2H2_C2H4 is A and (CH4_H2 is C or CH4_H2 is D) and C2H4_C2H6 is D then DIAGNOSTICO is D4
  rule: if C2H2_C2H4 is A and CH4_H2 is A and (C2H4_C2H6 is A or C2H4_C2H6 is B) then DIAGNOSTICO is D5
  rule: if (C2H2_C2H4 is A or C2H2_C2H4 is B) and CH4_H2 is A and (C2H4_C2H6 is A or C2H4_C2H6 is B) then DIAGNOSTICO is D6
  rule: if C2H2_C2H4 is not A and CH4_H2 is B and (C2H4_C2H6 is A or C2H4_C2H6 is B) then DIAGNOSTICO is D7
  rule: if (C2H2_C2H4 is B or C2H2_C2H4 is C) and CH4_H2 is B and C2H4_C2H6 is D then DIAGNOSTICO is D8

Is this the code you want? This is my .fll file.. Thanks for your help Juan…

[Juan Rada-Vilela (admin)]

Hi,

thank you for posting your engine. It seems to me it might be a bug. I will revise this later today. If you would like to do some debugging meanwhile, please try to find out what are the three operands found in the stack in Antecedent when loading the rule.

Sorry about this.

Alternatively, you could just do:

Engine engine = new FllImporter().fromFile("yourFile.fll");

[Unknown]

Thanks a lot Juan.. I´ll try debugging the class.. if i find anything i´ll tell you.. And i will try using the engine like you said. Thanks a lot.

[Author]

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