Mercurial > hg > camir-aes2014
diff toolboxes/FullBNT-1.0.7/bnt/inference/dynamic/@pearl_unrolled_dbn_inf_engine/enter_evidence.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/inference/dynamic/@pearl_unrolled_dbn_inf_engine/enter_evidence.m Tue Feb 10 15:05:51 2015 +0000 @@ -0,0 +1,41 @@ +function [engine, loglik, niter] = enter_evidence(engine, evidence, varargin) +% ENTER_EVIDENCE Add the specified evidence to the network (loopy_unrolled_dbn) +% [engine, loglik, niter] = enter_evidence(engine, evidence, ....) +% +% evidence{i,t} = [] if if X(i,t) is hidden, and otherwise contains its observed value (scalar or column vector) +% +% The following optional arguments can be specified in the form of name/value pairs: +% [default value in brackets] +% +% maximize - if 1, does max-product (not yet supported), else sum-product [0] +% filename - as in loopy_pearl +% +% e.g., engine = enter_evidence(engine, ev, 'maximize', 1) + +maximize = 0; +filename = engine.filename; + +if nargin >= 2 + args = varargin; + nargs = length(args); + for i=1:2:nargs + switch args{i}, + case 'maximize', maximize = args{i+1}; + case 'filename', filename = args{i+1}; + end + end +end + + +[ss T] = size(evidence); +if T ~= engine.T + bnetT = dbn_to_bnet(bnet_from_engine(engine), T); + engine.unrolled_engine = pearl_inf_engine(bnetT, 'protocol', engine.protocol, ... + 'max_iter', engine.max_iter_per_slice * T, ... + 'tol', engine.tol, 'momentum', engine.momentum); + engine.T = T; +end +[engine.unrolled_engine, loglik, niter] = enter_evidence(engine.unrolled_engine, evidence(:), ... + 'maximize', maximize, 'filename', filename); + +