167 lines
4.4 KiB
Prolog
167 lines
4.4 KiB
Prolog
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/*******************************************************
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Belief Propagation and Variable Elimination Interface
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********************************************************/
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:- module(clpbn_bp,
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[bp/3,
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check_if_bp_done/1,
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init_bp_solver/4,
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run_bp_solver/3,
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call_bp_ground/5,
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finalize_bp_solver/1
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]).
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:- use_module(library('clpbn/dists'),
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[dist/4,
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get_dist_domain/2,
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get_dist_domain_size/2,
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get_dist_params/2
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]).
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:- use_module(library('clpbn/display'),
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[clpbn_bind_vals/3]).
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:- use_module(library('clpbn/aggregates'),
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[check_for_agg_vars/2]).
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:- use_module(library(charsio),
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[term_to_atom/2]).
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:- use_module(library(pfl),
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[skolem/2,
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get_pfl_parameters/2
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]).
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:- use_module(library(lists)).
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:- use_module(library(atts)).
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:- use_module(library(bhash)).
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:- use_module(horus,
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[create_ground_network/4,
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set_factors_params/2,
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run_ground_solver/3,
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set_vars_information/2,
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free_ground_network/1
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]).
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call_bp_ground(QueryKeys, AllKeys, Factors, Evidence, Output) :-
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b_hash_new(Hash0),
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keys_to_ids(AllKeys, 0, Hash0, Hash),
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get_factors_type(Factors, Type),
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evidence_to_ids(Evidence, Hash, EvidenceIds),
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factors_to_ids(Factors, Hash, FactorIds),
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%writeln(type:Type), writeln(''),
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%writeln(allKeys:AllKeys), writeln(''),
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%writeln(factors:Factors), writeln(''),
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%writeln(factorIds:FactorIds), writeln(''),
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%writeln(evidence:Evidence), writeln(''),
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%writeln(evidenceIds:EvidenceIds), writeln(''),
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create_ground_network(Type, FactorIds, EvidenceIds, Network),
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%get_vars_information(AllKeys, StatesNames),
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%set_vars_information(AllKeys, StatesNames),
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run_solver(ground(Network,Hash), QueryKeys, Solutions),
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%writeln(answer:Solutions),
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%clpbn_bind_vals([QueryKeys], Solutions, Output).
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free_ground_network(Network).
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run_solver(ground(Network,Hash), QueryKeys, Solutions) :-
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%get_dists_parameters(DistIds, DistsParams),
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%set_factors_params(Network, DistsParams),
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list_of_keys_to_ids(QueryKeys, Hash, QueryIds),
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%writeln(queryKeys:QueryKeys), writeln(''),
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%writeln(queryIds:QueryIds), writeln(''),
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list_of_keys_to_ids(QueryKeys, Hash, QueryIds),
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run_ground_solver(Network, [QueryIds], Solutions).
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keys_to_ids([], _, Hash, Hash).
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keys_to_ids([Key|AllKeys], I0, Hash0, Hash) :-
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b_hash_insert(Hash0, Key, I0, HashI),
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I is I0+1,
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keys_to_ids(AllKeys, I, HashI, Hash).
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get_factors_type([f(bayes, _, _)|_], bayes) :- ! .
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get_factors_type([f(markov, _, _)|_], markov) :- ! .
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list_of_keys_to_ids([], _, []).
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list_of_keys_to_ids([Key|QueryKeys], Hash, [Id|QueryIds]) :-
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b_hash_lookup(Key, Id, Hash),
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list_of_keys_to_ids(QueryKeys, Hash, QueryIds).
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factors_to_ids([], _, []).
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factors_to_ids([f(_, Keys, CPT)|Fs], Hash, [f(Ids, Ranges, CPT, DistId)|NFs]) :-
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list_of_keys_to_ids(Keys, Hash, Ids),
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DistId = 0,
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get_ranges(Keys, Ranges),
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factors_to_ids(Fs, Hash, NFs).
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get_ranges([],[]).
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get_ranges(K.Ks, Range.Rs) :- !,
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skolem(K,Domain),
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length(Domain,Range),
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get_ranges(Ks, Rs).
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evidence_to_ids([], _, []).
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evidence_to_ids([Key=Ev|QueryKeys], Hash, [Id=Ev|QueryIds]) :-
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b_hash_lookup(Key, Id, Hash),
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evidence_to_ids(QueryKeys, Hash, QueryIds).
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get_vars_information([], []).
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get_vars_information(Key.QueryKeys, Domain.StatesNames) :-
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pfl:skolem(Key, Domain),
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get_vars_information(QueryKeys, StatesNames).
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finalize_bp_solver(bp(Network, _)) :-
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free_ground_network(Network).
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bp([[]],_,_) :- !.
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bp([QueryVars], AllVars, Output) :-
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init_bp_solver(_, AllVars, _, Network),
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run_bp_solver([QueryVars], LPs, Network),
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finalize_bp_solver(Network),
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clpbn_bind_vals([QueryVars], LPs, Output).
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init_bp_solver(_, AllVars0, _, bp(BayesNet, DistIds)) :-
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%check_for_agg_vars(AllVars0, AllVars),
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get_vars_info(AllVars, VarsInfo, DistIds0),
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sort(DistIds0, DistIds),
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create_ground_network(VarsInfo, BayesNet),
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true.
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run_bp_solver(QueryVars, Solutions, bp(Network, DistIds)) :-
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get_dists_parameters(DistIds, DistsParams),
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set_factors_params(Network, DistsParams),
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vars_to_ids(QueryVars, QueryVarsIds),
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run_ground_solver(Network, QueryVarsIds, Solutions).
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get_dists_parameters([],[]).
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get_dists_parameters([Id|Ids], [dist(Id, Params)|DistsInfo]) :-
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get_dist_params(Id, Params),
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get_dists_parameters(Ids, DistsInfo).
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