Merge branch 'master' of https://github.com/redpony/cdec

1 files changed, 0 insertions, 270 deletions

diff --git a/utils/ccrp.h b/utils/ccrp.h
deleted file mode 100644
index f5d3fc78..00000000
--- a/utils/ccrp.h
+++ /dev/null
@@ -1,270 +0,0 @@
-#ifndef _CCRP_H_
-#define _CCRP_H_
-
-#include <numeric>
-#include <cassert>
-#include <cmath>
-#include <list>
-#include <iostream>
-#include <vector>
-#include <tr1/unordered_map>
-#include <boost/functional/hash.hpp>
-#include "sampler.h"
-#include "slice_sampler.h"
-#include "crp_table_manager.h"
-#include "m.h"
-
-// Chinese restaurant process (Pitman-Yor parameters) with table tracking.
-
-template <typename Dish, typename DishHash = boost::hash<Dish> >
-class CCRP {
- public:
-  CCRP(double disc, double strength) :
-      num_tables_(),
-      num_customers_(),
-      discount_(disc),
-      strength_(strength),
-      discount_prior_strength_(std::numeric_limits<double>::quiet_NaN()),
-      discount_prior_beta_(std::numeric_limits<double>::quiet_NaN()),
-      strength_prior_shape_(std::numeric_limits<double>::quiet_NaN()),
-      strength_prior_rate_(std::numeric_limits<double>::quiet_NaN()) {
-    check_hyperparameters();
-  }
-
-  CCRP(double d_strength, double d_beta, double c_shape, double c_rate, double d = 0.9, double c = 1.0) :
-      num_tables_(),
-      num_customers_(),
-      discount_(d),
-      strength_(c),
-      discount_prior_strength_(d_strength),
-      discount_prior_beta_(d_beta),
-      strength_prior_shape_(c_shape),
-      strength_prior_rate_(c_rate) {
-    check_hyperparameters();
-  }
-
-  void check_hyperparameters() {
-    if (discount_ < 0.0 || discount_ >= 1.0) {
-      std::cerr << "Bad discount: " << discount_ << std::endl;
-      abort();
-    }
-    if (strength_ <= -discount_) {
-      std::cerr << "Bad strength: " << strength_ << " (discount=" << discount_ << ")" << std::endl;
-      abort();
-    }
-  }
-
-  double discount() const { return discount_; }
-  double strength() const { return strength_; }
-  void set_hyperparameters(double d, double s) {
-    discount_ = d; strength_ = s;
-    check_hyperparameters();
-  }
-  void set_discount(double d) { discount_ = d; check_hyperparameters(); }
-  void set_strength(double a) { strength_ = a; check_hyperparameters(); }
-
-  bool has_discount_prior() const {
-    return !std::isnan(discount_prior_strength_);
-  }
-
-  bool has_strength_prior() const {
-    return !std::isnan(strength_prior_shape_);
-  }
-
-  void clear() {
-    num_tables_ = 0;
-    num_customers_ = 0;
-    dish_locs_.clear();
-  }
-
-  unsigned num_tables() const {
-    return num_tables_;
-  }
-
-  unsigned num_tables(const Dish& dish) const {
-    const typename std::tr1::unordered_map<Dish, CRPTableManager, DishHash>::const_iterator it = dish_locs_.find(dish);
-    if (it == dish_locs_.end()) return 0;
-    return it->second.num_tables();
-  }
-
-  unsigned num_customers() const {
-    return num_customers_;
-  }
-
-  unsigned num_customers(const Dish& dish) const {
-    const typename std::tr1::unordered_map<Dish, CRPTableManager, DishHash>::const_iterator it = dish_locs_.find(dish);
-    if (it == dish_locs_.end()) return 0;
-    return it->num_customers();
-  }
-
-  // returns +1 or 0 indicating whether a new table was opened
-  //   p = probability with which the particular table was selected
-  //       excluding p0
-  template <typename T>
-  int increment(const Dish& dish, const T& p0, MT19937* rng, T* p = NULL) {
-    CRPTableManager& loc = dish_locs_[dish];
-    bool share_table = false;
-    if (loc.num_customers()) {
-      const T p_empty = T(strength_ + num_tables_ * discount_) * p0;
-      const T p_share = T(loc.num_customers() - loc.num_tables() * discount_);
-      share_table = rng->SelectSample(p_empty, p_share);
-    }
-    if (share_table) {
-      loc.share_table(discount_, rng);
-    } else {
-      loc.create_table();
-      ++num_tables_;
-    }
-    ++num_customers_;
-    return (share_table ? 0 : 1);
-  }
-
-  // returns -1 or 0, indicating whether a table was closed
-  int decrement(const Dish& dish, MT19937* rng) {
-    CRPTableManager& loc = dish_locs_[dish];
-    assert(loc.num_customers());
-    if (loc.num_customers() == 1) {
-      dish_locs_.erase(dish);
-      --num_tables_;
-      --num_customers_;
-      return -1;
-    } else {
-      int delta = loc.remove_customer(rng);
-      --num_customers_;
-      if (delta) --num_tables_;
-      return delta;
-    }
-  }
-
-  template <typename T>
-  T prob(const Dish& dish, const T& p0) const {
-    const typename std::tr1::unordered_map<Dish, CRPTableManager, DishHash>::const_iterator it = dish_locs_.find(dish);
-    const T r = T(num_tables_ * discount_ + strength_);
-    if (it == dish_locs_.end()) {
-      return r * p0 / T(num_customers_ + strength_);
-    } else {
-      return (T(it->second.num_customers() - discount_ * it->second.num_tables()) + r * p0) /
-               T(num_customers_ + strength_);
-    }
-  }
-
-  double log_crp_prob() const {
-    return log_crp_prob(discount_, strength_);
-  }
-
-  // taken from http://en.wikipedia.org/wiki/Chinese_restaurant_process
-  // does not include P_0's
-  double log_crp_prob(const double& discount, const double& strength) const {
-    double lp = 0.0;
-    if (has_discount_prior())
-      lp = Md::log_beta_density(discount, discount_prior_strength_, discount_prior_beta_);
-    if (has_strength_prior())
-      lp += Md::log_gamma_density(strength + discount, strength_prior_shape_, strength_prior_rate_);
-    assert(lp <= 0.0);
-    if (num_customers_) {
-      if (discount > 0.0) {
-        const double r = lgamma(1.0 - discount);
-        if (strength)
-          lp += lgamma(strength) - lgamma(strength / discount);
-        lp += - lgamma(strength + num_customers_)
-             + num_tables_ * log(discount) + lgamma(strength / discount + num_tables_);
-        assert(std::isfinite(lp));
-        for (typename std::tr1::unordered_map<Dish, CRPTableManager, DishHash>::const_iterator it = dish_locs_.begin();
-             it != dish_locs_.end(); ++it) {
-          const CRPTableManager& cur = it->second;  // TODO check
-          for (CRPTableManager::const_iterator ti = cur.begin(); ti != cur.end(); ++ti) {
-            lp += (lgamma(ti->first - discount) - r) * ti->second;
-          }
-        }
-      } else if (!discount) { // discount == 0.0
-        lp += lgamma(strength) + num_tables_ * log(strength) - lgamma(strength + num_tables_);
-        assert(std::isfinite(lp));
-        for (typename std::tr1::unordered_map<Dish, CRPTableManager, DishHash>::const_iterator it = dish_locs_.begin();
-             it != dish_locs_.end(); ++it) {
-          const CRPTableManager& cur = it->second;
-          lp += lgamma(cur.num_tables());
-        }
-      } else {
-        assert(!"discount less than 0 detected!");
-      }
-    }
-    assert(std::isfinite(lp));
-    return lp;
-  }
-
-  void resample_hyperparameters(MT19937* rng, const unsigned nloop = 5, const unsigned niterations = 10) {
-    assert(has_discount_prior() || has_strength_prior());
-    if (num_customers() == 0) return;
-    DiscountResampler dr(*this);
-    StrengthResampler sr(*this);
-    for (unsigned iter = 0; iter < nloop; ++iter) {
-      if (has_strength_prior()) {
-        strength_ = slice_sampler1d(sr, strength_, *rng, -discount_ + std::numeric_limits<double>::min(),
-                               std::numeric_limits<double>::infinity(), 0.0, niterations, 100*niterations);
-      }
-      if (has_discount_prior()) {
-        double min_discount = std::numeric_limits<double>::min();
-        if (strength_ < 0.0) min_discount -= strength_;
-        discount_ = slice_sampler1d(dr, discount_, *rng, min_discount,
-                               1.0, 0.0, niterations, 100*niterations);
-      }
-    }
-    strength_ = slice_sampler1d(sr, strength_, *rng, -discount_,
-                             std::numeric_limits<double>::infinity(), 0.0, niterations, 100*niterations);
-  }
-
-  struct DiscountResampler {
-    DiscountResampler(const CCRP& crp) : crp_(crp) {}
-    const CCRP& crp_;
-    double operator()(const double& proposed_discount) const {
-      return crp_.log_crp_prob(proposed_discount, crp_.strength_);
-    }
-  };
-
-  struct StrengthResampler {
-    StrengthResampler(const CCRP& crp) : crp_(crp) {}
-    const CCRP& crp_;
-    double operator()(const double& proposed_strength) const {
-      return crp_.log_crp_prob(crp_.discount_, proposed_strength);
-    }
-  };
-
-  void Print(std::ostream* out) const {
-    std::cerr << "PYP(d=" << discount_ << ",c=" << strength_ << ") customers=" << num_customers_ << std::endl;
-    for (typename std::tr1::unordered_map<Dish, CRPTableManager, DishHash>::const_iterator it = dish_locs_.begin();
-         it != dish_locs_.end(); ++it) {
-      (*out) << it->first << " : " << it->second << std::endl;
-    }
-  }
-
-  typedef typename std::tr1::unordered_map<Dish, CRPTableManager, DishHash>::const_iterator const_iterator;
-  const_iterator begin() const {
-    return dish_locs_.begin();
-  }
-  const_iterator end() const {
-    return dish_locs_.end();
-  }
-
-  unsigned num_tables_;
-  unsigned num_customers_;
-  std::tr1::unordered_map<Dish, CRPTableManager, DishHash> dish_locs_;
-
-  double discount_;
-  double strength_;
-
-  // optional beta prior on discount_ (NaN if no prior)
-  double discount_prior_strength_;
-  double discount_prior_beta_;
-
-  // optional gamma prior on strength_ (NaN if no prior)
-  double strength_prior_shape_;
-  double strength_prior_rate_;
-};
-
-template <typename T,typename H>
-std::ostream& operator<<(std::ostream& o, const CCRP<T,H>& c) {
-  c.Print(&o);
-  return o;
-}
-
-#endif