1 files changed, 0 insertions, 45 deletions
diff --git a/training/risk.cc b/training/risk.cc
deleted file mode 100644
index d5a12cfd..00000000
--- a/training/risk.cc
+++ /dev/null
@@ -1,45 +0,0 @@
-#include "risk.h"
-
-#include "prob.h"
-#include "candidate_set.h"
-#include "ns.h"
-
-using namespace std;
-
-namespace training {
-
-// g = \sum_e p(e|f) * loss(e) * (phi(e,f) - E[phi(e,f)])
-double CandidateSetRisk::operator()(const vector<double>& params,
-                                    SparseVector<double>* g) const {
-  prob_t z;
-  for (unsigned i = 0; i < cands_.size(); ++i) {
-    const prob_t u(cands_[i].fmap.dot(params), init_lnx());
-    z += u;
-  }
-  const double log_z = log(z);
-
-  SparseVector<double> exp_feats;
-  if (g) {
-    for (unsigned i = 0; i < cands_.size(); ++i) {
-      const double log_prob = cands_[i].fmap.dot(params) - log_z;
-      const double prob = exp(log_prob);
-      exp_feats += cands_[i].fmap * prob;
-    }
-  }
-
-  double risk = 0;
-  for (unsigned i = 0; i < cands_.size(); ++i) {
-    const double log_prob = cands_[i].fmap.dot(params) - log_z;
-    const double prob = exp(log_prob);
-    const double cost = metric_.IsErrorMetric() ? metric_.ComputeScore(cands_[i].eval_feats)
-                                                : 1.0 - metric_.ComputeScore(cands_[i].eval_feats);
-    const double r = prob * cost;
-    risk += r;
-    if (g) (*g) += (cands_[i].fmap - exp_feats) * r;
-  }
-  return risk;
-}
-
-}
-
-