507d3058f4
git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@2028 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
144 lines
3.3 KiB
Prolog
144 lines
3.3 KiB
Prolog
:- module(clpbn_matrix_utils, [init_CPT/2,
|
|
project_from_CPT/3,
|
|
reorder_CPT/5,
|
|
get_dist_size/2,
|
|
normalise_CPT/2,
|
|
multiply_CPTs/3,
|
|
list_from_CPT/2]).
|
|
|
|
:- use_module(dists, [get_dist_domain_size/2,
|
|
get_dist_domain/2]).
|
|
|
|
:- use_module(library(matrix), [matrix_new/4,
|
|
matrix_select/4,
|
|
matrix_dims/2,
|
|
matrix_shuffle/3,
|
|
matrix_expand/3,
|
|
matrix_op/4,
|
|
matrix_dims/2,
|
|
matrix_sum/2,
|
|
matrix_sum_out/3,
|
|
matrix_op_to_all/4,
|
|
matrix_to_list/2]).
|
|
|
|
:- use_module(library(lists), [nth0/3]).
|
|
|
|
init_CPT(List, Sizes, TAB) :-
|
|
matrix_new(floats, Sizes, List, TAB).
|
|
|
|
project_from_CPT(V,tab(Table,Deps,_),tab(NewTable,NDeps,NSzs)) :-
|
|
evidence(V,Pos), !,
|
|
vnth(Deps, 0, V, N, NDeps),
|
|
matrix_select(Table, N, Pos, NewTable),
|
|
matrix_dims(NewTable, NSzs).
|
|
project_from_CPT(V,tab(Table,Deps,_),tab(NewTable,NDeps,NSzs)) :-
|
|
vnth(Deps, 0, V, N, NDeps),
|
|
matrix_sum_out(Table, N, NewTable),
|
|
matrix_dims(NewTable, NSzs).
|
|
|
|
evidence(V, Pos) :-
|
|
clpbn:get_atts(V, [evidence(Ev),dist(Id,_)]),
|
|
get_dist_domain(Id, Dom),
|
|
nth0(Pos, Dom, Ev).
|
|
|
|
vnth([V1|Deps], N, V, N, Deps) :-
|
|
V == V1, !.
|
|
vnth([V1|Deps], N0, V, N, [V1|NDeps]) :-
|
|
N1 is N0+1,
|
|
vnth(Deps, N1, V, N, NDeps).
|
|
|
|
reorder_CPT(Vs0,T0,Vs,TF,Sizes) :-
|
|
var(Vs), !,
|
|
order_vec(Vs0,Vs,Map),
|
|
(
|
|
Vs == V0
|
|
->
|
|
matrix_shuffle(T0,Map,TF)
|
|
;
|
|
TF = T0
|
|
),
|
|
matrix_dims(TF, Sizes).
|
|
reorder_CPT(Vs0,T0,Vs,TF,Sizes) :-
|
|
mapping(Vs0,Vs,Map),
|
|
(
|
|
Vs == V0
|
|
->
|
|
matrix_shuffle(T0,Map,TF)
|
|
;
|
|
TF = T0
|
|
),
|
|
matrix_dims(TF, Sizes).
|
|
|
|
order_vec(Vs0,Vs,Map) :-
|
|
add_indices(Vs0,0,Is),
|
|
keysort(Is,NIs),
|
|
get_els(NIs, Vs, Map).
|
|
|
|
add_indices([],_,[]).
|
|
add_indices([V|Vs0],I0,[V-I0|Is]) :-
|
|
I is I0+1,
|
|
add_indices(Vs0,I,Is).
|
|
|
|
get_els([], [], []).
|
|
get_els([V-I|NIs], [V|Vs], [I|Map]) :-
|
|
get_els(NIs, Vs, Map).
|
|
|
|
mapping(Vs0,Vs,Map) :-
|
|
add_indices(Vs0,0,I1s),
|
|
add_indices( Vs,I2s),
|
|
keysort(I1s,Ks),
|
|
keysort(I2s,Ks),
|
|
split_map(I2s, Map).
|
|
|
|
add_indices([],[]).
|
|
add_indices([V|Vs0],[V-_|I1s]) :-
|
|
add_indices(Vs0,I1s).
|
|
|
|
split_map([], []).
|
|
split_map([_-M|Is], [M|Map]) :-
|
|
split_map(Is, Map).
|
|
|
|
multiply_CPTs(tab(Tab1, Deps1, Sz1), tab(Tab2, Deps2, Sz2), tab(OT, NDeps, NSz)) :-
|
|
expand_tabs(Deps1, Sz1, Deps2, Sz2, Map1, Map2, NDeps),
|
|
matrix_expand(Tab1, Map1, NTab1),
|
|
matrix_expand(Tab2, Map2, NTab2),
|
|
matrix_op(NTab1,NTab2,*,OT),
|
|
matrix_dims(OT,NSz).
|
|
|
|
expand_tabs([], [], [], [], [], [], []).
|
|
expand_tabs([V1|Deps1], [S1|Sz1], [], [], [0|Map1], [S1|Map2], [V1|NDeps]) :-
|
|
expand_tabs(Deps1, Sz1, [], [], Map1, Map2, NDeps).
|
|
expand_tabs([], [], [V2|Deps2], [S2|Sz2], [S2|Map1], [0|Map2], [V2|NDeps]) :-
|
|
expand_tabs([], [], Deps2, Sz2, Map1, Map2, NDeps).
|
|
expand_tabs([V1|Deps1], [S1|Sz1], [V2|Deps2], [S2|Sz2], Map1, Map2, NDeps) :-
|
|
compare(C,V1,V2),
|
|
(C == = ->
|
|
NDeps = [V1|MDeps],
|
|
Map1 = [0|M1],
|
|
Map2 = [0|M2],
|
|
NDeps = [V1|MDeps],
|
|
expand_tabs(Deps1, Sz1, Deps2, Sz2, M1, M2, MDeps)
|
|
;
|
|
C == < ->
|
|
NDeps = [V1|MDeps],
|
|
Map1 = [0|M1],
|
|
Map2 = [S1|M2],
|
|
NDeps = [V1|MDeps],
|
|
expand_tabs(Deps1, Sz1, [V2|Deps2], [S2|Sz2], M1, M2, MDeps)
|
|
;
|
|
NDeps = [V2|MDeps],
|
|
Map1 = [S2|M1],
|
|
Map2 = [0|M2],
|
|
NDeps = [V2|MDeps],
|
|
expand_tabs([V1|Deps1], [S1|Sz1], Deps2, Sz2, M1, M2, MDeps)
|
|
).
|
|
|
|
normalise_CPT(MAT,NMAT) :-
|
|
matrix_sum(MAT, Sum),
|
|
matrix_op_to_all(MAT,/,Sum,NMAT).
|
|
|
|
list_from_CPT(MAT, List) :-
|
|
matrix_to_list(MAT, List).
|
|
|
|
|