diff options
author | Chris Dyer <cdyer@cs.cmu.edu> | 2012-10-11 14:06:32 -0400 |
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committer | Chris Dyer <cdyer@cs.cmu.edu> | 2012-10-11 14:06:32 -0400 |
commit | 9339c80d465545aec5a6dccfef7c83ca715bf11f (patch) | |
tree | 64c56d558331edad1db3832018c80e799551c39a /gi/clda/src/crp.h | |
parent | 438dac41810b7c69fa10203ac5130d20efa2da9f (diff) | |
parent | afd7da3b2338661657ad0c4e9eec681e014d37bf (diff) |
Merge branch 'master' of https://github.com/redpony/cdec
Diffstat (limited to 'gi/clda/src/crp.h')
-rw-r--r-- | gi/clda/src/crp.h | 50 |
1 files changed, 0 insertions, 50 deletions
diff --git a/gi/clda/src/crp.h b/gi/clda/src/crp.h deleted file mode 100644 index 9d35857e..00000000 --- a/gi/clda/src/crp.h +++ /dev/null @@ -1,50 +0,0 @@ -#ifndef _CRP_H_ -#define _CRP_H_ - -// shamelessly adapted from code by Phil Blunsom and Trevor Cohn - -#include <boost/functional/hash.hpp> -#include <tr1/unordered_map> - -#include "prob.h" - -template <typename DishType, typename Hash = boost::hash<DishType> > -class CRP { - public: - CRP(double alpha) : alpha_(alpha), palpha_(alpha), total_customers_() {} - void increment(const DishType& dish); - void decrement(const DishType& dish); - void erase(const DishType& dish) { - counts_.erase(dish); - } - inline int count(const DishType& dish) const { - const typename MapType::const_iterator i = counts_.find(dish); - if (i == counts_.end()) return 0; else return i->second; - } - inline prob_t prob(const DishType& dish, const prob_t& p0) const { - return (prob_t(count(dish)) + palpha_ * p0) / prob_t(total_customers_ + alpha_); - } - private: - typedef std::tr1::unordered_map<DishType, int, Hash> MapType; - MapType counts_; - const double alpha_; - const prob_t palpha_; - int total_customers_; -}; - -template <typename Dish, typename Hash> -void CRP<Dish,Hash>::increment(const Dish& dish) { - ++counts_[dish]; - ++total_customers_; -} - -template <typename Dish, typename Hash> -void CRP<Dish,Hash>::decrement(const Dish& dish) { - typename MapType::iterator i = counts_.find(dish); - assert(i != counts_.end()); - if (--i->second == 0) - counts_.erase(i); - --total_customers_; -} - -#endif |