47 lines
1.2 KiB
Prolog
47 lines
1.2 KiB
Prolog
% learn distribution for school database.
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% we do not consider the aggregates yet.
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:- [pos:train].
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:- ['~/Yap/work/CLPBN/clpbn/examples/School/school_32'].
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:- ['~/Yap/work/CLPBN/learning/em'].
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main :-
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findall(X,goal(X),L),
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em(L,0.01,10,CPTs,Lik),
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writeln(Lik:CPTs).
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%
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% change to 0.05, 0.1, 0.2 to make things simpler/harder
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%
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missing(0.3).
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% miss 30% of the examples.
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goal(professor_ability(P,V)) :-
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pos:professor_ability(P,V1),
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missing(X),
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( random > X -> V = V1 ; true).
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% miss 10% of the examples.
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goal(professor_popularity(P,V)) :-
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pos:professor_popularity(P,V1),
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missing(X),
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( random > X -> V = V1 ; true).
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goal(registration_grade(P,V)) :-
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pos:registration_grade(P,V1),
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missing(X),
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( random > X -> V = V1 ; true).
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goal(student_intelligence(P,V)) :-
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pos:student_intelligence(P,V1),
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missing(X),
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( random > X -> V = V1 ; true).
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goal(course_difficulty(P,V)) :-
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pos:course_difficulty(P,V1),
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missing(X),
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( random > X -> V = V1 ; true).
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goal(registration_satisfaction(P,V)) :-
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pos:registration_satisfaction(P,V1),
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missing(X),
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( random > X -> V = V1 ; true).
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