Mercurial > hg > camir-aes2014
diff toolboxes/FullBNT-1.0.7/bnt/general/shrink_obs_dims_in_table.m @ 0:e9a9cd732c1e tip
first hg version after svn
author | wolffd |
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date | Tue, 10 Feb 2015 15:05:51 +0000 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/toolboxes/FullBNT-1.0.7/bnt/general/shrink_obs_dims_in_table.m Tue Feb 10 15:05:51 2015 +0000 @@ -0,0 +1,15 @@ +function T2 = shrink_obs_dims_in_table(T1, dom, evidence) +% SHRINK_OBS_DIMS_IN_TABLE Set observed dimensions to size 1 +% T2 = shrink_obs_dims_in_table(T1, dom, evidence) +% +% If 'T1' contains observed nodes, it will have 0s in the positions that are +% inconsistent with the evidence. We now remove these 0s and set the corresponding dimensions to +% size 1, to be consistent with the way most inference engines handle evidence, which is to +% shrink observed nodes before doing inference. + +% This is used by pearl and enumerative inf. engines. + +odom = dom(~isemptycell(evidence(dom))); +vals = cat(1,evidence{odom}); +ndx = mk_multi_index(length(dom), find_equiv_posns(odom, dom), vals(:)); +T2 = T1(ndx{:});