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

1 files changed, 0 insertions, 499 deletions

diff --git a/gi/pyp-topics/src/pyp-topics.cc b/gi/pyp-topics/src/pyp-topics.cc
deleted file mode 100644
index 4de52fd7..00000000
--- a/gi/pyp-topics/src/pyp-topics.cc
+++ /dev/null
@@ -1,499 +0,0 @@
-#include "timing.h"
-#include "pyp-topics.hh"
-#include "contexts_corpus.hh"
-
-//Dict const *dict;
-
-//#include <boost/date_time/posix_time/posix_time_types.hpp>
-void PYPTopics::sample_corpus(const Corpus& corpus, int samples,
-                              int freq_cutoff_start, int freq_cutoff_end,
-                              int freq_cutoff_interval,
-                              int max_contexts_per_document,
-                              F temp_start, F temp_end) {
-  Timer timer;
-  //dict = &((ContextsCorpus*) &corpus)->dict();
-
-  if (!m_backoff.get()) {
-    m_word_pyps.clear();
-    m_word_pyps.push_back(PYPs());
-  }
-
-  std::cerr << "\n Training with " << m_word_pyps.size()-1 << " backoff level"
-    << (m_word_pyps.size()==2 ? ":" : "s:") << std::endl;
-
-
-  for (int i=0; i<(int)m_word_pyps.size(); ++i)
-  {
-    m_word_pyps.at(i).reserve(m_num_topics);
-    for (int j=0; j<m_num_topics; ++j)
-      m_word_pyps.at(i).push_back(new PYP<int>(0.01, 1.0, m_seed));
-  }
-  std::cerr << std::endl;
-
-  m_document_pyps.reserve(corpus.num_documents());
-  for (int j=0; j<corpus.num_documents(); ++j)
-    m_document_pyps.push_back(new PYP<int>(0.01, 1.0, m_seed));
-
-  m_topic_p0 = 1.0/m_num_topics;
-  m_term_p0 = 1.0/(F)m_backoff->terms_at_level(m_word_pyps.size()-1);
-  //m_term_p0 = 1.0/corpus.num_types();
-  m_backoff_p0 = 1.0/corpus.num_documents();
-
-  std::cerr << " Documents: " << corpus.num_documents() << " Terms: "
-    << corpus.num_types() << std::endl;
-
-  int frequency_cutoff = freq_cutoff_start;
-  std::cerr << " Context frequency cutoff set to " << frequency_cutoff << std::endl;
-
-  timer.Reset();
-  // Initialisation pass
-  int document_id=0, topic_counter=0;
-  for (Corpus::const_iterator corpusIt=corpus.begin();
-       corpusIt != corpus.end(); ++corpusIt, ++document_id) {
-    m_corpus_topics.push_back(DocumentTopics(corpusIt->size(), 0));
-
-    int term_index=0;
-    for (Document::const_iterator docIt=corpusIt->begin();
-         docIt != corpusIt->end(); ++docIt, ++term_index) {
-      topic_counter++;
-      Term term = *docIt;
-
-      // sample a new_topic
-      //int new_topic = (topic_counter % m_num_topics);
-      int freq = corpus.context_count(term);
-      int new_topic = -1;
-      if (freq > frequency_cutoff
-          && (!max_contexts_per_document || term_index < max_contexts_per_document)) {
-        //new_topic = sample(document_id, term);
-        //new_topic = document_id % m_num_topics;
-        new_topic = (int) (rnd() * m_num_topics);
-
-        // add the new topic to the PYPs
-        increment(term, new_topic);
-
-        if (m_use_topic_pyp) {
-          F p0 = m_topic_pyp.prob(new_topic, m_topic_p0);
-          int table_delta = m_document_pyps[document_id].increment(new_topic, p0);
-          if (table_delta)
-            m_topic_pyp.increment(new_topic, m_topic_p0);
-        }
-        else m_document_pyps[document_id].increment(new_topic, m_topic_p0);
-      }
-
-      m_corpus_topics[document_id][term_index] = new_topic;
-    }
-  }
-  std::cerr << "  Initialized in " << timer.Elapsed() << " seconds\n";
-
-  int* randomDocIndices = new int[corpus.num_documents()];
-  for (int i = 0; i < corpus.num_documents(); ++i)
-	  randomDocIndices[i] = i;
-
-  if (num_jobs < max_threads)
-    num_jobs = max_threads;
-  int job_incr = (int) ( (float)m_document_pyps.size() / float(num_jobs) );
-
-  // Sampling phase
-  for (int curr_sample=0; curr_sample < samples; ++curr_sample) {
-    if (freq_cutoff_interval > 0 && curr_sample != 1
-        && curr_sample % freq_cutoff_interval == 1
-        && frequency_cutoff > freq_cutoff_end) {
-      frequency_cutoff--;
-      std::cerr << "\n Context frequency cutoff set to " << frequency_cutoff << std::endl;
-    }
-
-    F temp = 1.0 / (temp_start - curr_sample*(temp_start-temp_end)/samples);
-    std::cerr << "\n  -- Sample " << curr_sample << " (T=" << temp << ") "; std::cerr.flush();
-
-    // Randomize the corpus indexing array
-    int tmp;
-    int processed_terms=0;
-    /*
-    for (int i = corpus.num_documents()-1; i > 0; --i)
-    {
-        //i+1 since j \in [0,i] but rnd() \in [0,1)
-    	int j = (int)(rnd() * (i+1));
-      assert(j >= 0 && j <= i);
-     	tmp = randomDocIndices[i];
-    	randomDocIndices[i] = randomDocIndices[j];
-    	randomDocIndices[j] = tmp;
-    }
-    */
-
-    // for each document in the corpus
-    int document_id;
-    for (int i=0; i<corpus.num_documents(); ++i) {
-    	document_id = randomDocIndices[i];
-
-      // for each term in the document
-      int term_index=0;
-      Document::const_iterator docEnd = corpus.at(document_id).end();
-      for (Document::const_iterator docIt=corpus.at(document_id).begin();
-           docIt != docEnd; ++docIt, ++term_index) {
-        if (max_contexts_per_document && term_index > max_contexts_per_document)
-          break;
-        
-        Term term = *docIt;
-
-        int freq = corpus.context_count(term);
-        if (freq < frequency_cutoff)
-          continue;
-
-        processed_terms++;
-
-        // remove the prevous topic from the PYPs
-        int current_topic = m_corpus_topics[document_id][term_index];
-        // a negative label mean that term hasn't been sampled yet
-        if (current_topic >= 0) {
-          decrement(term, current_topic);
-
-          int table_delta = m_document_pyps[document_id].decrement(current_topic);
-          if (m_use_topic_pyp && table_delta < 0)
-            m_topic_pyp.decrement(current_topic);
-        }
-
-        // sample a new_topic
-        int new_topic = sample(document_id, term, temp);
-        //std::cerr << "TERM: " << dict->Convert(term) << " (" << term << ") " << " Old Topic: " 
-        //  << current_topic << " New Topic: " << new_topic << "\n" << std::endl;
-
-        // add the new topic to the PYPs
-        m_corpus_topics[document_id][term_index] = new_topic;
-        increment(term, new_topic);
-
-        if (m_use_topic_pyp) {
-          F p0 = m_topic_pyp.prob(new_topic, m_topic_p0);
-          int table_delta = m_document_pyps[document_id].increment(new_topic, p0);
-          if (table_delta)
-            m_topic_pyp.increment(new_topic, m_topic_p0);
-        }
-        else m_document_pyps[document_id].increment(new_topic, m_topic_p0);
-      }
-      if (document_id && document_id % 10000 == 0) {
-        std::cerr << "."; std::cerr.flush();
-      }
-    }
-    std::cerr << " ||| LLH= " << log_likelihood();
-
-    if (curr_sample != 0 && curr_sample % 10 == 0) {
-    //if (true) {
-      std::cerr << " ||| time=" << (timer.Elapsed() / 10.0) << " sec/sample" << std::endl;
-      timer.Reset();
-      std::cerr << "     ... Resampling hyperparameters (";
-      
-      // resample the hyperparamters
-      F log_p=0.0;
-      if (max_threads == 1)
-      { 
-        std::cerr << "1 thread)" << std::endl; std::cerr.flush();
-        log_p += hresample_topics();
-        log_p += hresample_docs(0, m_document_pyps.size());
-      }
-      else
-      { //parallelize
-        std::cerr << max_threads << " threads, " << num_jobs << " jobs)" << std::endl; std::cerr.flush();
-        
-        WorkerPool<JobReturnsF, F> pool(max_threads); 
-        int i=0, sz = m_document_pyps.size();
-        //documents...
-        while (i <= sz - 2*job_incr)
-        {    
-          JobReturnsF job = boost::bind(&PYPTopics::hresample_docs, this, i, i+job_incr);
-          pool.addJob(job);
-          i += job_incr;
-        }
-        //  do all remaining documents
-        JobReturnsF job = boost::bind(&PYPTopics::hresample_docs, this, i,sz);
-        pool.addJob(job);
-        
-        //topics...
-        JobReturnsF topics_job = boost::bind(&PYPTopics::hresample_topics, this);
-        pool.addJob(topics_job);
-
-        log_p += pool.get_result(); //blocks
-
-      }
-
-      if (m_use_topic_pyp) {
-        m_topic_pyp.resample_prior(rnd);
-        log_p += m_topic_pyp.log_restaurant_prob();
-      }
-
-      std::cerr.precision(10);
-      std::cerr << " ||| LLH=" << log_likelihood() << " ||| resampling time=" << timer.Elapsed() << " sec" << std::endl;
-      timer.Reset();
-
-      int k=0;
-      std::cerr << "Topics distribution: ";
-      std::cerr.precision(2);
-      for (PYPs::iterator pypIt=m_word_pyps.front().begin();
-           pypIt != m_word_pyps.front().end(); ++pypIt, ++k) {
-        if (k % 5 == 0) std::cerr << std::endl << '\t';
-        std::cerr << "<" << k << ":" << pypIt->num_customers() << ","
-          << pypIt->num_types() << "," << m_topic_pyp.prob(k, m_topic_p0) << "> ";
-      }
-      std::cerr.precision(10);
-      std::cerr << std::endl;
-    }
-  }
-  delete [] randomDocIndices;
-}
-
-PYPTopics::F PYPTopics::hresample_docs(int start, int end)
-{
-  int resample_counter=0;
-  F log_p = 0.0;
-  assert(start >= 0);
-  assert(end >= 0);
-  assert(start <= end);
-  for (int i=start; i < end; ++i)
-  {
-    m_document_pyps[i].resample_prior(rnd);
-    log_p += m_document_pyps[i].log_restaurant_prob();
-    if (resample_counter++ % 5000 == 0) {
-      std::cerr << "."; std::cerr.flush();
-    }
-  }
-  return log_p;
-}
-
-PYPTopics::F PYPTopics::hresample_topics()
-{
-  F log_p = 0.0;
-  for (std::vector<PYPs>::iterator levelIt=m_word_pyps.begin();
-      levelIt != m_word_pyps.end(); ++levelIt) {
-    for (PYPs::iterator pypIt=levelIt->begin();
-        pypIt != levelIt->end(); ++pypIt) {
-
-      pypIt->resample_prior(rnd);
-      log_p += pypIt->log_restaurant_prob();
-    }
-    std::cerr << log_p << std::endl;
-  }
-  return log_p;
-}
-
-PYPTopics::F PYPTopics::log_likelihood() const 
-{
-  F log_p = 0.0;
-
-  // LLH of topic term distribution
-  size_t i=0;
-  for (std::vector<PYPs>::const_iterator levelIt=m_word_pyps.begin();
-      levelIt != m_word_pyps.end(); ++levelIt, ++i) {
-    for (PYPs::const_iterator pypIt=levelIt->begin();
-        pypIt != levelIt->end(); ++pypIt, ++i) {
-      log_p += pypIt->log_restaurant_prob();
-
-      if (i == m_word_pyps.size()-1)
-        log_p += (pypIt->num_tables() * -log(m_backoff->terms_at_level(i)));
-      else
-        log_p += (pypIt->num_tables() * log(m_term_p0));
-    }
-  }
-  std::cerr << " TERM LLH: " << log_p << " "; //std::endl;
-
-  // LLH of document topic distribution
-  for (size_t i=0; i < m_document_pyps.size(); ++i) {
-    log_p += m_document_pyps[i].log_restaurant_prob();
-    if (!m_use_topic_pyp) log_p += (m_document_pyps[i].num_tables() * m_topic_p0);
-  }
-  if (m_use_topic_pyp) {
-    log_p += m_topic_pyp.log_restaurant_prob();
-    log_p += (m_topic_pyp.num_tables() * log(m_topic_p0));
-  }
-
-  return log_p;
-}
-
-void PYPTopics::decrement(const Term& term, int topic, int level) {
-  //std::cerr << "PYPTopics::decrement(" << term << "," << topic << "," << level << ")" << std::endl;
-  int table_delta = m_word_pyps.at(level).at(topic).decrement(term);
-  if (table_delta && m_backoff.get()) {
-    Term backoff_term = (*m_backoff)[term];
-    if (!m_backoff->is_null(backoff_term))
-      decrement(backoff_term, topic, level+1);
-  }
-}
-
-void PYPTopics::increment(const Term& term, int topic, int level) {
-  //std::cerr << "PYPTopics::increment(" << term << "," << topic << "," << level << ")" << std::endl;
-  int table_delta = m_word_pyps.at(level).at(topic).increment(term, word_pyps_p0(term, topic, level));
-
-  if (table_delta && m_backoff.get()) {
-    Term backoff_term = (*m_backoff)[term];
-    if (!m_backoff->is_null(backoff_term))
-      increment(backoff_term, topic, level+1);
-  }
-}
-
-int PYPTopics::sample(const DocumentId& doc, const Term& term, F inv_temp) {
-  // First pass: collect probs
-  F sum=0.0;
-  std::vector<F> sums;
-  for (int k=0; k<m_num_topics; ++k) {
-    F p_w_k = prob(term, k);
-
-    F topic_prob = m_topic_p0;
-    if (m_use_topic_pyp) topic_prob = m_topic_pyp.prob(k, m_topic_p0);
-
-    //F p_k_d = m_document_pyps[doc].prob(k, topic_prob);
-    F p_k_d = m_document_pyps[doc].unnormalised_prob(k, topic_prob);
-
-    F prob = p_w_k*p_k_d;
-    /*
-    if (prob < 0.0) { std::cerr << "\n\n" << prob << " " << p_w_k << " " << p_k_d << std::endl; assert(false); }
-    if (prob > 1.0) { std::cerr << "\n\n" << prob << " " << p_w_k << " " << p_k_d << std::endl; assert(false); }
-    assert (pow(prob, inv_temp) >= 0.0);
-    assert (pow(prob, inv_temp) <= 1.0);
-    */
-    sum += pow(prob, inv_temp);
-    sums.push_back(sum);
-  }
-  // Second pass: sample a topic
-  F cutoff = rnd() * sum;
-  for (int k=0; k<m_num_topics; ++k) {
-    if (cutoff <= sums[k])
-      return k;
-  }
-  assert(false);
-}
-
-PYPTopics::F PYPTopics::word_pyps_p0(const Term& term, int topic, int level) const {
-  //for (int i=0; i<level+1; ++i) std::cerr << "  ";
-  //std::cerr << "PYPTopics::word_pyps_p0(" << term << "," << topic << "," << level << ")" << std::endl;
-
-  F p0 = m_term_p0;
-  if (m_backoff.get()) {
-    //static F fudge=m_backoff_p0; // TODO
-
-    Term backoff_term = (*m_backoff)[term];
-    //std::cerr << "T: " << term << " BO: " << backoff_term << std::endl;
-    if (!m_backoff->is_null(backoff_term)) {
-      assert (level < m_backoff->order());
-      //p0 = (1.0/(F)m_backoff->terms_at_level(level))*prob(backoff_term, topic, level+1);
-      p0 = m_term_p0*prob(backoff_term, topic, level+1);
-      p0 = prob(backoff_term, topic, level+1);
-    }
-    else
-      p0 = (1.0/(F) m_backoff->terms_at_level(level));
-      //p0 = m_term_p0;
-  }
-  //for (int i=0; i<level+1; ++i) std::cerr << "  ";
-  //std::cerr << "PYPTopics::word_pyps_p0(" << term << "," << topic << "," << level << ") = " << p0 << std::endl;
-  return p0;
-}
-
-PYPTopics::F PYPTopics::prob(const Term& term, int topic, int level) const {
-  //for (int i=0; i<level+1; ++i) std::cerr << "  ";
-  //std::cerr << "PYPTopics::prob(" << dict->Convert(term) << "," << topic << "," << level << ")" << std::endl;
-
-  F p0 = word_pyps_p0(term, topic, level);
-  F p_w_k = m_word_pyps.at(level).at(topic).prob(term, p0);
-
-  /*
-  for (int i=0; i<level+1; ++i) std::cerr << "  ";
-  std::cerr << "PYPTopics::prob(" << dict->Convert(term) << "," << topic << "," << level << ") = " << p_w_k << std::endl;
-  for (int i=0; i<level+1; ++i) std::cerr << "  ";
-  m_word_pyps.at(level).at(topic).debug_info(std::cerr);
-  */
-  return p_w_k;
-}
-
-int PYPTopics::max_topic() const {
-  if (!m_use_topic_pyp)
-    return -1;
-
-  F current_max=0.0;
-  int current_topic=-1;
-  for (int k=0; k<m_num_topics; ++k) {
-    F prob = m_topic_pyp.prob(k, m_topic_p0);
-    if (prob > current_max) {
-      current_max = prob;
-      current_topic = k;
-    }
-  }
-  assert(current_topic >= 0);
-  return current_topic;
-}
-
-std::pair<int,PYPTopics::F> PYPTopics::max(const DocumentId& doc) const {
-  //std::cerr << "PYPTopics::max(" << doc << "," << term << ")" << std::endl;
-  // collect probs
-  F current_max=0.0;
-  int current_topic=-1;
-  for (int k=0; k<m_num_topics; ++k) {
-    //F p_w_k = prob(term, k);
-
-    F topic_prob = m_topic_p0;
-    if (m_use_topic_pyp)
-      topic_prob = m_topic_pyp.prob(k, m_topic_p0);
-
-    F prob = 0;
-    if (doc < 0) prob = topic_prob;
-    else         prob = m_document_pyps[doc].prob(k, topic_prob);
-
-    if (prob > current_max) {
-      current_max = prob;
-      current_topic = k;
-    }
-  }
-  assert(current_topic >= 0);
-  assert(current_max >= 0);
-  return std::make_pair(current_topic, current_max);
-}
-
-std::pair<int,PYPTopics::F> PYPTopics::max(const DocumentId& doc, const Term& term) const {
-  //std::cerr << "PYPTopics::max(" << doc << "," << term << ")" << std::endl;
-  // collect probs
-  F current_max=0.0;
-  int current_topic=-1;
-  for (int k=0; k<m_num_topics; ++k) {
-    F p_w_k = prob(term, k);
-
-    F topic_prob = m_topic_p0;
-    if (m_use_topic_pyp)
-      topic_prob = m_topic_pyp.prob(k, m_topic_p0);
-
-    F p_k_d = 0;
-    if (doc < 0) p_k_d = topic_prob;
-    else         p_k_d = m_document_pyps[doc].prob(k, topic_prob);
-
-    F prob = (p_w_k*p_k_d);
-    if (prob > current_max) {
-      current_max = prob;
-      current_topic = k;
-    }
-  }
-  assert(current_topic >= 0);
-  assert(current_max >= 0);
-  return std::make_pair(current_topic,current_max);
-}
-
-std::ostream& PYPTopics::print_document_topics(std::ostream& out) const {
-  for (CorpusTopics::const_iterator corpusIt=m_corpus_topics.begin();
-       corpusIt != m_corpus_topics.end(); ++corpusIt) {
-    int term_index=0;
-    for (DocumentTopics::const_iterator docIt=corpusIt->begin();
-         docIt != corpusIt->end(); ++docIt, ++term_index) {
-      if (term_index) out << " ";
-      out << *docIt;
-    }
-    out << std::endl;
-  }
-  return out;
-}
-
-std::ostream& PYPTopics::print_topic_terms(std::ostream& out) const {
-  for (PYPs::const_iterator pypsIt=m_word_pyps.front().begin();
-       pypsIt != m_word_pyps.front().end(); ++pypsIt) {
-    int term_index=0;
-    for (PYP<int>::const_iterator termIt=pypsIt->begin();
-         termIt != pypsIt->end(); ++termIt, ++term_index) {
-      if (term_index) out << " ";
-      out << termIt->first << ":" << termIt->second;
-    }
-    out << std::endl;
-  }
-  return out;
-}