facilities.hpp

Go to the documentation of this file.

#ifndef MLPACK_CORE_CV_METRICS_FACILITIES_HPP
#define MLPACK_CORE_CV_METRICS_FACILITIES_HPP

#include <mlpack/core.hpp>
#include <mlpack/core/metrics/lmetric.hpp>

namespace mlpack {
namespace cv {

template<typename DataType, typename Metric>
DataType PairwiseDistances(const DataType& data,
                           const Metric& metric)
{
  DataType distances = DataType(data.n_cols, data.n_cols, arma::fill::none);
  for (size_t i = 0; i < data.n_cols; i++)
  {
    for (size_t j = 0; j < i; j++)
    {
      distances(i, j) = metric.Evaluate(data.col(i), data.col(j));
      distances(j, i) = distances(i, j);
    }
  }
  distances.diag().zeros();
  return distances;
}

} // namespace cv
} // namespace mlpack

#endif