diff options
author | Chris Dyer <cdyer@cab.ark.cs.cmu.edu> | 2012-10-02 00:19:43 -0400 |
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committer | Chris Dyer <cdyer@cab.ark.cs.cmu.edu> | 2012-10-02 00:19:43 -0400 |
commit | e26434979adc33bd949566ba7bf02dff64e80a3e (patch) | |
tree | d1c72495e3af6301bd28e7e66c42de0c7a944d1f /gi/pf/align-lexonly-pyp.cc | |
parent | 0870d4a1f5e14cc7daf553b180d599f09f6614a2 (diff) |
cdec cleanup, remove bayesian stuff, parsing stuff
Diffstat (limited to 'gi/pf/align-lexonly-pyp.cc')
-rw-r--r-- | gi/pf/align-lexonly-pyp.cc | 243 |
1 files changed, 0 insertions, 243 deletions
diff --git a/gi/pf/align-lexonly-pyp.cc b/gi/pf/align-lexonly-pyp.cc deleted file mode 100644 index e7509f57..00000000 --- a/gi/pf/align-lexonly-pyp.cc +++ /dev/null @@ -1,243 +0,0 @@ -#include <iostream> -#include <queue> - -#include <boost/program_options.hpp> -#include <boost/program_options/variables_map.hpp> - -#include "tdict.h" -#include "stringlib.h" -#include "filelib.h" -#include "array2d.h" -#include "sampler.h" -#include "corpus.h" -#include "pyp_tm.h" -#include "hpyp_tm.h" -#include "quasi_model2.h" - -using namespace std; -namespace po = boost::program_options; - -void InitCommandLine(int argc, char** argv, po::variables_map* conf) { - po::options_description opts("Configuration options"); - opts.add_options() - ("samples,s",po::value<unsigned>()->default_value(1000),"Number of samples") - ("infer_alignment_hyperparameters,I", "Infer alpha and p_null, otherwise fixed values will be assumed") - ("p_null,0", po::value<double>()->default_value(0.08), "probability of aligning to null") - ("align_alpha,a", po::value<double>()->default_value(4.0), "how 'tight' is the bias toward be along the diagonal?") - ("input,i",po::value<string>(),"Read parallel data from") - ("random_seed,S",po::value<uint32_t>(), "Random seed"); - po::options_description clo("Command line options"); - clo.add_options() - ("config", po::value<string>(), "Configuration file") - ("help,h", "Print this help message and exit"); - po::options_description dconfig_options, dcmdline_options; - dconfig_options.add(opts); - dcmdline_options.add(opts).add(clo); - - po::store(parse_command_line(argc, argv, dcmdline_options), *conf); - if (conf->count("config")) { - ifstream config((*conf)["config"].as<string>().c_str()); - po::store(po::parse_config_file(config, dconfig_options), *conf); - } - po::notify(*conf); - - if (conf->count("help") || (conf->count("input") == 0)) { - cerr << dcmdline_options << endl; - exit(1); - } -} - -MT19937* prng; - -struct LexicalAlignment { - unsigned char src_index; - bool is_transliteration; - vector<pair<short, short> > derivation; -}; - -struct AlignedSentencePair { - vector<WordID> src; - vector<WordID> trg; - vector<LexicalAlignment> a; - Array2D<short> posterior; -}; - -template <class LexicalTranslationModel> -struct Aligner { - Aligner(const vector<vector<WordID> >& lets, - int vocab_size, - int num_letters, - const po::variables_map& conf, - vector<AlignedSentencePair>* c) : - corpus(*c), - paj_model(conf["align_alpha"].as<double>(), conf["p_null"].as<double>()), - infer_paj(conf.count("infer_alignment_hyperparameters") > 0), - model(lets, vocab_size, num_letters), - kNULL(TD::Convert("NULL")) { - assert(lets[kNULL].size() == 0); - } - - vector<AlignedSentencePair>& corpus; - QuasiModel2 paj_model; - const bool infer_paj; - LexicalTranslationModel model; - const WordID kNULL; - - void ResampleHyperparameters() { - model.ResampleHyperparameters(prng); - if (infer_paj) paj_model.ResampleHyperparameters(prng); - } - - void InitializeRandom() { - cerr << "Initializing with random alignments ...\n"; - for (unsigned i = 0; i < corpus.size(); ++i) { - AlignedSentencePair& asp = corpus[i]; - asp.a.resize(asp.trg.size()); - for (unsigned j = 0; j < asp.trg.size(); ++j) { - unsigned char& a_j = asp.a[j].src_index; - a_j = prng->next() * (1 + asp.src.size()); - const WordID f_a_j = (a_j ? asp.src[a_j - 1] : kNULL); - model.Increment(f_a_j, asp.trg[j], &*prng); - paj_model.Increment(a_j, j, asp.src.size(), asp.trg.size()); - } - } - cerr << "Corpus intialized randomly." << endl; - cerr << "LLH = " << Likelihood() << " \t(Amodel=" << paj_model.Likelihood() - << " TModel=" << model.Likelihood() << ") contexts=" << model.UniqueConditioningContexts() << endl; - } - - void ResampleCorpus() { - for (unsigned i = 0; i < corpus.size(); ++i) { - AlignedSentencePair& asp = corpus[i]; - SampleSet<prob_t> ss; ss.resize(asp.src.size() + 1); - for (unsigned j = 0; j < asp.trg.size(); ++j) { - unsigned char& a_j = asp.a[j].src_index; - const WordID e_j = asp.trg[j]; - WordID f_a_j = (a_j ? asp.src[a_j - 1] : kNULL); - model.Decrement(f_a_j, e_j, prng); - paj_model.Decrement(a_j, j, asp.src.size(), asp.trg.size()); - - for (unsigned prop_a_j = 0; prop_a_j <= asp.src.size(); ++prop_a_j) { - const WordID prop_f = (prop_a_j ? asp.src[prop_a_j - 1] : kNULL); - ss[prop_a_j] = model.Prob(prop_f, e_j); - ss[prop_a_j] *= paj_model.Prob(prop_a_j, j, asp.src.size(), asp.trg.size()); - } - a_j = prng->SelectSample(ss); - f_a_j = (a_j ? asp.src[a_j - 1] : kNULL); - model.Increment(f_a_j, e_j, prng); - paj_model.Increment(a_j, j, asp.src.size(), asp.trg.size()); - } - } - } - - prob_t Likelihood() const { - return model.Likelihood() * paj_model.Likelihood(); - } -}; - -void ExtractLetters(const set<WordID>& v, vector<vector<WordID> >* l, set<WordID>* letset = NULL) { - for (set<WordID>::const_iterator it = v.begin(); it != v.end(); ++it) { - vector<WordID>& letters = (*l)[*it]; - if (letters.size()) continue; // if e and f have the same word - - const string& w = TD::Convert(*it); - - size_t cur = 0; - while (cur < w.size()) { - const size_t len = UTF8Len(w[cur]); - letters.push_back(TD::Convert(w.substr(cur, len))); - if (letset) letset->insert(letters.back()); - cur += len; - } - } -} - -void Debug(const AlignedSentencePair& asp) { - cerr << TD::GetString(asp.src) << endl << TD::GetString(asp.trg) << endl; - Array2D<bool> a(asp.src.size(), asp.trg.size()); - for (unsigned j = 0; j < asp.trg.size(); ++j) { - assert(asp.a[j].src_index <= asp.src.size()); - if (asp.a[j].src_index) a(asp.a[j].src_index - 1, j) = true; - } - cerr << a << endl; -} - -void AddSample(AlignedSentencePair* asp) { - for (unsigned j = 0; j < asp->trg.size(); ++j) - asp->posterior(asp->a[j].src_index, j)++; -} - -void WriteAlignments(const AlignedSentencePair& asp) { - bool first = true; - for (unsigned j = 0; j < asp.trg.size(); ++j) { - int src_index = -1; - int mc = -1; - for (unsigned i = 0; i <= asp.src.size(); ++i) { - if (asp.posterior(i, j) > mc) { - mc = asp.posterior(i, j); - src_index = i; - } - } - - if (src_index) { - if (first) first = false; else cout << ' '; - cout << (src_index - 1) << '-' << j; - } - } - cout << endl; -} - -int main(int argc, char** argv) { - po::variables_map conf; - InitCommandLine(argc, argv, &conf); - - if (conf.count("random_seed")) - prng = new MT19937(conf["random_seed"].as<uint32_t>()); - else - prng = new MT19937; - - vector<vector<int> > corpuse, corpusf; - set<int> vocabe, vocabf; - corpus::ReadParallelCorpus(conf["input"].as<string>(), &corpusf, &corpuse, &vocabf, &vocabe); - cerr << "f-Corpus size: " << corpusf.size() << " sentences\n"; - cerr << "f-Vocabulary size: " << vocabf.size() << " types\n"; - cerr << "f-Corpus size: " << corpuse.size() << " sentences\n"; - cerr << "f-Vocabulary size: " << vocabe.size() << " types\n"; - assert(corpusf.size() == corpuse.size()); - - vector<AlignedSentencePair> corpus(corpuse.size()); - for (unsigned i = 0; i < corpuse.size(); ++i) { - corpus[i].src.swap(corpusf[i]); - corpus[i].trg.swap(corpuse[i]); - corpus[i].posterior.resize(corpus[i].src.size() + 1, corpus[i].trg.size()); - } - corpusf.clear(); corpuse.clear(); - - vocabf.insert(TD::Convert("NULL")); - vector<vector<WordID> > letters(TD::NumWords()); - set<WordID> letset; - ExtractLetters(vocabe, &letters, &letset); - ExtractLetters(vocabf, &letters, NULL); - letters[TD::Convert("NULL")].clear(); - - //Aligner<PYPLexicalTranslation> aligner(letters, vocabe.size(), letset.size(), conf, &corpus); - Aligner<HPYPLexicalTranslation> aligner(letters, vocabe.size(), letset.size(), conf, &corpus); - aligner.InitializeRandom(); - - const unsigned samples = conf["samples"].as<unsigned>(); - for (int i = 0; i < samples; ++i) { - for (int j = 65; j < 67; ++j) Debug(corpus[j]); - if (i % 10 == 9) { - aligner.ResampleHyperparameters(); - cerr << "LLH = " << aligner.Likelihood() << " \t(Amodel=" << aligner.paj_model.Likelihood() - << " TModel=" << aligner.model.Likelihood() << ") contexts=" << aligner.model.UniqueConditioningContexts() << endl; - } - aligner.ResampleCorpus(); - if (i > (samples / 5) && (i % 6 == 5)) for (int j = 0; j < corpus.size(); ++j) AddSample(&corpus[j]); - } - for (unsigned i = 0; i < corpus.size(); ++i) - WriteAlignments(corpus[i]); - aligner.model.Summary(); - - return 0; -} |