model_metric.cc

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#include "kernel/gp/src/model_metric.h"
 
namespace vita
{
 
double accuracy_metric::operator()(const core_reg_lambda_f *l,
                                   const dataframe &d) const
{
  Expects(!d.classes());
  Expects(d.begin() != d.end());
 
  std::uintmax_t ok(0), total_nr(0);
 
  for (const auto &example : d)
  {
    if (const auto res = (*l)(example);
        has_value(res) && issmall(lexical_cast<D_DOUBLE>(res)
                                  - label_as<D_DOUBLE>(example)))
      ++ok;
 
    ++total_nr;
  }
 
  Ensures(total_nr);
  return static_cast<double>(ok) / static_cast<double>(total_nr);
}
 
double accuracy_metric::operator()(const core_class_lambda_f *l,
                                   const dataframe &d) const
{
  Expects(d.classes());
  Expects(d.begin() != d.end());
 
  std::uintmax_t ok(0), total_nr(0);
 
  for (const auto &example : d)
  {
    if (l->tag(example).label == label(example))
      ++ok;
 
    ++total_nr;
  }
 
  Ensures(total_nr);
  return static_cast<double>(ok) / static_cast<double>(total_nr);
}
 
}  // namespace vita