summaryrefslogtreecommitdiff
path: root/decoder
diff options
context:
space:
mode:
Diffstat (limited to 'decoder')
-rw-r--r--decoder/decoder.cc21
1 files changed, 21 insertions, 0 deletions
diff --git a/decoder/decoder.cc b/decoder/decoder.cc
index ac063659..b7774acc 100644
--- a/decoder/decoder.cc
+++ b/decoder/decoder.cc
@@ -806,6 +806,7 @@ bool DecoderImpl::Decode(const string& input, DecoderObserver* o) {
}
if (rp.fid_summary) {
+#if 0
const prob_t z = forest.PushWeightsToGoal(1.0);
if (!SILENT) { cerr << " " << passtr << " adding summary feature " << FD::Convert(rp.fid_summary) << " log(Z)=" << log(z) << endl; }
if (!isfinite(log(z)) || isnan(log(z))) {
@@ -823,6 +824,26 @@ bool DecoderImpl::Decode(const string& input, DecoderObserver* o) {
}
forest.Reweight(cur_weights); // reset weights
}
+#endif
+ Hypergraph::EdgeProbs posts;
+ const prob_t z = forest.ComputeEdgePosteriors(1.0, &posts);
+ if (!isfinite(log(z)) || isnan(log(z))) {
+ cerr << " " << passtr << " !!! Invalid partition detected, abandoning.\n";
+ } else {
+ for (int i = 0; i < forest.nodes_.size(); ++i) {
+ const Hypergraph::EdgesVector& in_edges = forest.nodes_[i].in_edges_;
+ prob_t node_post = prob_t(0);
+ for (int j = 0; j < in_edges.size(); ++j)
+ node_post += (posts[in_edges[j]] / z);
+ const double log_np = log(node_post);
+ if (!isfinite(log_np) || isnan(log_np)) {
+ cerr << "got bad posterior prob for node " << i << endl;
+ abort();
+ }
+ for (int j = 0; j < in_edges.size(); ++j)
+ forest.edges_[in_edges[j]].feature_values_.set_value(rp.fid_summary, exp(log_np));
+ }
+ }
}
string fullbp = "beam_prune" + StringSuffixForRescoringPass(pass);