178 lines
4.3 KiB
Prolog
178 lines
4.3 KiB
Prolog
|
|
/************************************************
|
|
|
|
Belief Propagation in CLP(BN)
|
|
|
|
**************************************************/
|
|
|
|
:- module(clpbn_bp,
|
|
[bp/3,
|
|
check_if_bp_done/1,
|
|
set_horus_flag/2,
|
|
init_bp_solver/4,
|
|
run_bp_solver/3,
|
|
finalize_bp_solver/1
|
|
]).
|
|
|
|
|
|
:- use_module(library('clpbn/dists'),
|
|
[dist/4,
|
|
get_dist_domain/2,
|
|
get_dist_domain_size/2,
|
|
get_dist_params/2
|
|
]).
|
|
|
|
|
|
:- use_module(library('clpbn/display'),
|
|
[clpbn_bind_vals/3]).
|
|
|
|
|
|
:- use_module(library('clpbn/aggregates'),
|
|
[check_for_agg_vars/2]).
|
|
|
|
|
|
:- use_module(library(atts)).
|
|
:- use_module(library(lists)).
|
|
:- use_module(library(charsio)).
|
|
|
|
:- use_module(horus).
|
|
|
|
:- attribute id/1.
|
|
|
|
|
|
%:- set_horus_flag(inf_alg, ve).
|
|
:- set_horus_flag(inf_alg, bn_bp).
|
|
%:- set_horus_flag(inf_alg, fg_bp).
|
|
%: -set_horus_flag(inf_alg, cbp).
|
|
|
|
:- set_horus_flag(schedule, seq_fixed).
|
|
%:- set_horus_flag(schedule, seq_random).
|
|
%:- set_horus_flag(schedule, parallel).
|
|
%:- set_horus_flag(schedule, max_residual).
|
|
|
|
:- set_horus_flag(accuracy, 0.0001).
|
|
|
|
:- set_horus_flag(max_iter, 1000).
|
|
|
|
:- set_horus_flag(use_logarithms, false).
|
|
%:- set_horus_flag(use_logarithms, true).
|
|
|
|
:- set_horus_flag(order_factor_variables, false).
|
|
%:- set_horus_flag(order_factor_variables, true).
|
|
|
|
|
|
|
|
bp([[]],_,_) :- !.
|
|
bp([QueryVars], AllVars, Output) :-
|
|
init_bp_solver(_, AllVars, _, Network),
|
|
run_bp_solver([QueryVars], LPs, Network),
|
|
finalize_bp_solver(Network),
|
|
clpbn_bind_vals([QueryVars], LPs, Output).
|
|
|
|
|
|
init_bp_solver(_, AllVars0, _, bp(BayesNet, DistIds)) :-
|
|
check_for_agg_vars(AllVars0, AllVars),
|
|
writeln('clpbn_vars:'),
|
|
print_clpbn_vars(AllVars),
|
|
assign_ids(AllVars, 0),
|
|
get_vars_info(AllVars, VarsInfo, DistIds0),
|
|
sort(DistIds0, DistIds),
|
|
create_ground_network(VarsInfo, BayesNet).
|
|
%get_extra_vars_info(AllVars, ExtraVarsInfo),
|
|
%set_extra_vars_info(BayesNet, ExtraVarsInfo).
|
|
|
|
|
|
run_bp_solver(QueryVars, Solutions, bp(Network, DistIds)) :-
|
|
get_dists_parameters(DistIds, DistsParams),
|
|
set_bayes_net_params(Network, DistsParams),
|
|
flatten_1_element_sublists(QueryVars, QueryVars1),
|
|
vars_to_ids(QueryVars1, QueryVarsIds),
|
|
run_other_solvers(Network, QueryVarsIds, Solutions).
|
|
|
|
|
|
finalize_bp_solver(bp(Network, _)) :-
|
|
free_bayesian_network(Network).
|
|
|
|
|
|
assign_ids([], _).
|
|
assign_ids([V|Vs], Count) :-
|
|
put_atts(V, [id(Count)]),
|
|
Count1 is Count + 1,
|
|
assign_ids(Vs, Count1).
|
|
|
|
|
|
get_vars_info([], [], []).
|
|
get_vars_info(V.Vs,
|
|
var(VarId,DS,Ev,PIds,DistId).VarsInfo,
|
|
DistId.DistIds) :-
|
|
clpbn:get_atts(V, [dist(DistId, Parents)]), !,
|
|
get_atts(V, [id(VarId)]),
|
|
get_dist_domain_size(DistId, DS),
|
|
get_evidence(V, Ev),
|
|
vars_to_ids(Parents, PIds),
|
|
get_vars_info(Vs, VarsInfo, DistIds).
|
|
|
|
|
|
get_evidence(V, Ev) :-
|
|
clpbn:get_atts(V, [evidence(Ev)]), !.
|
|
get_evidence(_V, -1). % no evidence !!!
|
|
|
|
|
|
vars_to_ids([], []).
|
|
vars_to_ids([L|Vars], [LIds|Ids]) :-
|
|
is_list(L), !,
|
|
vars_to_ids(L, LIds),
|
|
vars_to_ids(Vars, Ids).
|
|
vars_to_ids([V|Vars], [VarId|Ids]) :-
|
|
get_atts(V, [id(VarId)]),
|
|
vars_to_ids(Vars, Ids).
|
|
|
|
|
|
get_extra_vars_info([], []).
|
|
get_extra_vars_info([V|Vs], [v(VarId, Label, Domain)|VarsInfo]) :-
|
|
get_atts(V, [id(VarId)]), !,
|
|
clpbn:get_atts(V, [key(Key),dist(DistId, _)]),
|
|
term_to_atom(Key, Label),
|
|
get_dist_domain(DistId, Domain0),
|
|
numbers_to_atoms(Domain0, Domain),
|
|
get_extra_vars_info(Vs, VarsInfo).
|
|
get_extra_vars_info([_|Vs], VarsInfo) :-
|
|
get_extra_vars_info(Vs, VarsInfo).
|
|
|
|
|
|
get_dists_parameters([],[]).
|
|
get_dists_parameters([Id|Ids], [dist(Id, Params)|DistsInfo]) :-
|
|
get_dist_params(Id, Params),
|
|
get_dists_parameters(Ids, DistsInfo).
|
|
|
|
|
|
numbers_to_atoms([], []).
|
|
numbers_to_atoms([Atom|L0], [Atom|L]) :-
|
|
atom(Atom), !,
|
|
numbers_to_atoms(L0, L).
|
|
numbers_to_atoms([Number|L0], [Atom|L]) :-
|
|
number_atom(Number, Atom),
|
|
numbers_to_atoms(L0, L).
|
|
|
|
|
|
flatten_1_element_sublists([],[]).
|
|
flatten_1_element_sublists([[H|[]]|T],[H|R]) :- !,
|
|
flatten_1_element_sublists(T,R).
|
|
flatten_1_element_sublists([H|T],[H|R]) :-
|
|
flatten_1_element_sublists(T,R).
|
|
|
|
|
|
print_clpbn_vars(Var.AllVars) :-
|
|
clpbn:get_atts(Var, [key(Key),dist(DistId,Parents)]),
|
|
parents_to_keys(Parents, ParentKeys),
|
|
writeln(Var:Key:ParentKeys:DistId),
|
|
print_clpbn_vars(AllVars).
|
|
print_clpbn_vars([]).
|
|
|
|
|
|
parents_to_keys([], []).
|
|
parents_to_keys(Var.Parents, Key.Keys) :-
|
|
clpbn:get_atts(Var, [key(Key)]),
|
|
parents_to_keys(Parents, Keys).
|
|
|