interact.h File Reference

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Functions
LEARNER::base_learner *	interact_setup (VW::config::options_i &options, vw &all)

Function Documentation

interact_setup()

LEARNER::base_learner* interact_setup	(	VW::config::options_i &	options,
		vw &	all
	)

Definition at line 156 of file interact.cc.

References VW::config::option_group_definition::add(), VW::config::options_i::add_and_parse(), LEARNER::as_singleline(), LEARNER::init_learner(), LEARNER::make_base(), VW::config::make_option(), vw::quiet, setup_base(), and VW::config::options_i::was_supplied().

Referenced by parse_reductions().

{
  std::string s;
  option_group_definition new_options("Interact via elementwise multiplication");
  new_options.add(
      make_option("interact", s).keep().help("Put weights on feature products from namespaces <n1> and <n2>"));
  options.add_and_parse(new_options);

  if (!options.was_supplied("interact"))
    return nullptr;

  if (s.length() != 2)
  {
    std::cerr << "Need two namespace arguments to interact: " << s << " won't do EXITING\n";
    return nullptr;
  }

  auto data = scoped_calloc_or_throw<interact>();

  data->n1 = (unsigned char)s[0];
  data->n2 = (unsigned char)s[1];
  if (!all.quiet)
    std::cerr << "Interacting namespaces " << data->n1 << " and " << data->n2 << std::endl;
  data->all = &all;

  LEARNER::learner<interact, example>* l;
  l = &LEARNER::init_learner(
      data, as_singleline(setup_base(options, all)), predict_or_learn<true, true>, predict_or_learn<false, true>, 1);

  return make_base(*l);
}