Mercurial > hg > camir-aes2014
diff toolboxes/FullBNT-1.0.7/bnt/CPDs/@discrete_CPD/Old/convert_to_table.m @ 0:e9a9cd732c1e tip
first hg version after svn
author | wolffd |
---|---|
date | Tue, 10 Feb 2015 15:05:51 +0000 |
parents | |
children |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/toolboxes/FullBNT-1.0.7/bnt/CPDs/@discrete_CPD/Old/convert_to_table.m Tue Feb 10 15:05:51 2015 +0000 @@ -0,0 +1,23 @@ +function T = convert_to_table(CPD, domain, local_ev, obs_bitv) +% CONVERT_TO_TABLE Convert a discrete CPD to a table +% function T = convert_to_table(CPD, domain, local_ev, obs_bitv) +% +% We convert the CPD to a CPT, and then lookup the evidence on the discrete parents. +% The resulting table can easily be converted to a potential. + + +CPT = CPD_to_CPT(CPD); +obs_child_only = ~any(obs_bitv(1:end-1)) & obs_bitv(end); + +if obs_child_only + sz = size(CPT); + CPT = reshape(CPT, prod(sz(1:end-1)), sz(end)); + o = local_ev{end}; + T = CPT(:, o); +else + odom = domain(obs_bitv); + vals = cat(1, local_ev{find(obs_bitv)}); % undo cell array + map = find_equiv_posns(odom, domain); + index = mk_multi_index(length(domain), map, vals); + T = CPT(index{:}); +end