SequenceTask Namespace Reference

Functions
void	initialize (Search::search &sch, size_t &, options_i &)
void	run (Search::search &sch, multi_ex &ec)

Variables
Search::search_task	task = {"sequence", run, initialize, nullptr, nullptr, nullptr}

Function Documentation

initialize()

void SequenceTask::initialize	(	Search::search &	sch,
		size_t &	,
		options_i &
	)

Definition at line 34 of file search_sequencetask.cc.

References Search::AUTO_CONDITION_FEATURES, Search::AUTO_HAMMING_LOSS, Search::EXAMPLES_DONT_CHANGE, and Search::search::set_options().

{
  sch.set_options(Search::AUTO_CONDITION_FEATURES |  // automatically add history features to our examples, please
      Search::AUTO_HAMMING_LOSS |     // please just use hamming loss on individual predictions -- we won't declare loss
      Search::EXAMPLES_DONT_CHANGE |  // we don't do any internal example munging
      0);
}

run()

void SequenceTask::run	(	Search::search &	sch,
		multi_ex &	ec
	)

Definition at line 42 of file search_sequencetask.cc.

References Search::search::get_history_length(), Search::search::output(), predict(), Search::search::pretty_label(), Search::predictor::set_condition_range(), Search::predictor::set_input(), Search::predictor::set_oracle(), and Search::predictor::set_tag().

{
  Search::predictor P(sch, (ptag)0);
  for (size_t i = 0; i < ec.size(); i++)
  {
    action oracle = ec[i]->l.multi.label;
    size_t prediction = P.set_tag((ptag)i + 1)
                            .set_input(*ec[i])
                            .set_oracle(oracle)
                            .set_condition_range((ptag)i, sch.get_history_length(), 'p')
                            .predict();

    if (sch.output().good())
      sch.output() << sch.pretty_label((uint32_t)prediction) << ' ';
  }
}

Variable Documentation

task

Search::search_task SequenceTask::task = {"sequence", run, initialize, nullptr, nullptr, nullptr}

Definition at line 13 of file search_sequencetask.cc.