This repository has been archived on 2023-08-20. You can view files and clone it, but cannot push or open issues or pull requests.
yap-6.3/packages/CLPBN/examples/School/parschema.yap
2012-09-23 13:24:49 +01:00

94 lines
2.1 KiB
Prolog

:- use_module(library(pfl)).
/* base file for school database. Supposed to be called from school_*.yap */
%
% bayes is a parfactor for a bayesian network,
% first argument is target of other arguments pop(K) <- abi(K)
% second argument is the name of a predicate to call for \phi (CPT)
% last argument is a list of goals defining the constraints over the elements
% of the
%
%
% these states that skolem variables abi(K) are in a parametric factor with
% with \phi defined by abi_table(X) and whose domain and constraints
% is obtained from professor/1.
%
bayes abi(K)::[h,m,l] ; abi_table ; [professor(K)].
bayes pop(K)::[h,m,l], abi(K) ; pop_table ; [professor(K)].
bayes diff(C) :: [h,m,l] ; diff_table ; [course(C,_)].
bayes int(S) :: [h,m,l] ; int_table ; [student(S)].
bayes grade(C,S)::[a,b,c,d], int(S), diff(C) ; grade_table ; [registration(_,C,S)].
bayes satisfaction(C,S)::[h,m,l], abi(P), grade(C,S) ; sat_table ; [reg_satisfaction(C,S,P)].
bayes rat(C) :: [h,m,l], Sats ; avg ; [course_rat(C, Sats)].
bayes rank(S) :: [a,b,c,d], Grades ; avg ; [student_ranking(S,Grades)].
grade(Key, Grade) :-
registration(Key, CKey, SKey),
grade(CKey, SKey, Grade).
reg_satisfaction(CKey, SKey, PKey) :-
registration(_Key, CKey, SKey),
course(CKey, PKey).
course_rat(CKey, Sats) :-
course(CKey, _),
setof(satisfaction(CKey,SKey),
PKey^reg_satisfaction(CKey, SKey, PKey),
Sats).
student_ranking(SKey, Grades) :-
student(SKey),
setof(grade(CKey,SKey), RKey^registration(RKey,CKey,SKey), Grades).
:- ensure_loaded(tables).
% convert to longer names
professor_ability(P,A) :- abi(P, A).
professor_popularity(P,A) :- pop(P, A).
registration_grade(R,A) :-
registration(R,C,S),
grade(C,S,A).
registration_satisfaction(R,A) :-
registration(R,C,S),
satisfaction(C,S,A).
student_intelligence(P,A) :- int(P, A).
course_difficulty(P,A) :- diff(P, A).
registration_course(R,C) :-
registration(R, C, _).
registration_student(R,S) :-
registration(R, _, S).
course_rating(C,X) :- rat(C,X).
%
% evidence
%
%abi(p0, h).
%pop(p1, m).
%pop(p2, h).
% Query
% ?- abi(p0, X).