From 3e6c1e09afe6224551945538a7bae1273ac7b26d Mon Sep 17 00:00:00 2001
From: graehl <graehl@ec762483-ff6d-05da-a07a-a48fb63a330f>
Date: Tue, 13 Jul 2010 02:54:45 +0000
Subject: vest oracle directions

git-svn-id: https://ws10smt.googlecode.com/svn/trunk@229 ec762483-ff6d-05da-a07a-a48fb63a330f
---
 vest/mr_vest_generate_mapper_input.cc | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

(limited to 'vest')

diff --git a/vest/mr_vest_generate_mapper_input.cc b/vest/mr_vest_generate_mapper_input.cc
index 9e702e2f..5c3e8181 100644
--- a/vest/mr_vest_generate_mapper_input.cc
+++ b/vest/mr_vest_generate_mapper_input.cc
@@ -5,6 +5,7 @@
 #include <boost/program_options.hpp>
 #include <boost/program_options/variables_map.hpp>
 
+#include "sampler.h"
 #include "filelib.h"
 #include "weights.h"
 #include "line_optimizer.h"
@@ -16,8 +17,7 @@ namespace po = boost::program_options;
 
 typedef SparseVector<double> Dir;
 
-typedef RandomNumberGenerator<boost::mt19937> RNG;
-RNG rng;
+MT19937 rng;
 
 struct oracle_directions {
   string forest_repository;
@@ -45,6 +45,18 @@ struct oracle_directions {
     }
     return dir;
   }
+  // if start_random is true, immediately sample w/ replacement from src sentences; otherwise, consume them sequentially until exhausted, then random.  oracle vectors are summed
+  void add_directions(vector<Dir> &dirs,unsigned n,unsigned batchsz=20,bool start_random=false) {
+    MT19937::IntRNG rsg=rng.inclusive(0,dev_set_size-1);
+    unsigned b=0;
+    for(unsigned i=0;i<n;++i) {
+      dirs.push_back(Dir());
+      Dir &d=dirs.back();
+      for (unsigned j=0;j<batchsz;++j,++b)
+        d+=(*this)[(start_random || b>=dev_set_size)?rsg():b];
+      d/=(double)batchsz;
+    }
+  }
 
 };
 
@@ -135,6 +147,7 @@ int main(int argc, char** argv) {
      &axes,
      !conf.count("no_primary")
     );
+  od.add_directions(axes,conf["oracle_directions"].as<unsigned>(),conf["oracle_batch"].as<unsigned>());
   compress_similar(axes,conf["max_similarity"].as<double>());
   for (int i = 0; i < od.dev_set_size; ++i)
     for (int j = 0; j < axes.size(); ++j)
-- 
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