Added interpolated scorer

example: to interpolate BLEU and CDER use --sctype=BLEU,CDER
to specify weights use --scconfig=weights:0.3+0.7

This scorer should replace MergeScorer (which requires mert-moses-multi.pl) soon.
Interpolated scorer is more universal and is used in the same way as other scorers.

1 files changed, 48 insertions, 0 deletions

diff --git a/mert/InterpolatedScorer.h b/mert/InterpolatedScorer.h
new file mode 100644
index 000000000..5d1f962c5
--- /dev/null
+++ b/mert/InterpolatedScorer.h
@@ -0,0 +1,48 @@
+#ifndef __INTERPOLATED_SCORER_H__
+#define __INTERPOLATED_SCORER_H__
+
+#include <algorithm>
+#include <cmath>
+#include <iostream>
+#include <iterator>
+#include <limits>
+#include <set>
+#include <sstream>
+#include <stdexcept>
+#include <string>
+#include <vector>
+#include "Types.h"
+#include "ScoreData.h"
+#include "Scorer.h"
+
+/**
+  * Class that includes other scorers eg.
+  * Interpolated HAMMING and BLEU scorer **/
+class InterpolatedScorer : public Scorer
+{
+
+public:
+  // name would be: "HAMMING,BLEU" or similar
+  InterpolatedScorer(const string& name, const string& config);
+  virtual ~InterpolatedScorer() {};
+  virtual void score(const candidates_t& candidates, const diffs_t& diffs,
+             statscores_t& scores) const;
+
+  void setReferenceFiles(const vector<string>& referenceFiles);
+  void prepareStats(size_t sid, const string& text, ScoreStats& entry);
+  virtual size_t NumberOfScores() const {
+    size_t sz=0;
+    for (vector<Scorer*>::const_iterator itsc =  _scorers.begin(); itsc < _scorers.end(); itsc++) {
+      sz += (*itsc)->NumberOfScores();
+    }
+    return sz;
+  };
+
+  virtual void setScoreData(ScoreData* data);
+
+protected:
+  vector<Scorer*> _scorers;
+  vector<float> _scorerWeights;
+};
+
+#endif //__INTERPOLATED_SCORER_H