basic.hpp

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#ifndef GPLIB_BASIC
#define GPLIB_BASIC

/* Include the basic files for this machine learning library */

#include <cmath>
#include <map>
#include <vector>

namespace gplib {
  //definition of basic constants
  const double pi = std::acos(-1);

  arma::mat upper_triangular_inverse(const arma::mat &upper_t);

  arma::vec get_observed_only(const arma::vec &vec,
                              const std::vector<bool> &observed);

  void split_indices(const std::vector<bool> &predicates,
                     std::vector<arma::uword> &true_part,
                     std::vector<arma::uword> &false_part);

  bool all_true(const std::vector<bool> &vec);


  bool check_symmetric(const arma::mat &A);

  arma::mat force_symmetric(const arma::mat &A);

  arma::mat force_diag(const arma::mat &A);

  arma::mat flatten(std::vector<arma::vec> &y);

  std::vector<double> flatten(std::vector<arma::mat> &M);

  std::vector<arma::mat> unflatten(std::vector<double> &M_params,
                                   std::vector<arma::mat> &M);

  void split(const std::vector<double> &theta, std::vector<double> &kernel_params,
      std::vector<double> &M_params);
};

#endif