diff options
Diffstat (limited to 'decoder')
| -rw-r--r-- | decoder/decoder.cc | 21 |
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); |