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#ifndef _DTRAIN_PAIRSAMPLING_H_
#define _DTRAIN_PAIRSAMPLING_H_
#include "kbestget.h"
#include "score.h"
#include <vector>
#include <string>
using namespace std;
#include "sampler.h" // cdec, MT19937
namespace dtrain
{
inline void
sample_all_pairs(vector<ScoredHyp>* s, vector<pair<ScoredHyp,ScoredHyp> > &training)
{
for (unsigned i = 0; i < s->size()-1; i++) {
for (unsigned j = i+1; j < s->size(); j++) {
pair<ScoredHyp,ScoredHyp> p;
p.first = (*s)[i];
p.second = (*s)[j];
training.push_back(p);
}
}
}
inline void
sample_rand_pairs(vector<ScoredHyp>* s, vector<pair<ScoredHyp,ScoredHyp> > &training,
MT19937* prng)
{
for (unsigned i = 0; i < s->size()-1; i++) {
for (unsigned j = i+1; j < s->size(); j++) {
if (prng->next() < .5) {
pair<ScoredHyp,ScoredHyp> p;
p.first = (*s)[i];
p.second = (*s)[j];
training.push_back(p);
}
}
}
}
} // namespace
#endif
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