/**
* Returns the log-likelihood of the specified datapoint
* and the slope along the given direction.
*/
real_pair<T>
value_slope(index_pair x, const dense_matrix<T>& dir) const {
return value_slope(x.first, x.second, dir);
}
/**
* Returns the log-likelihood of the specified datapoint
* and the slope along the given direction.
*/
real_pair<T>
value_slope(const uint_vector& x, const dense_matrix<T>& dir) const {
assert(x.size() == 2);
return value_slope(x[0], x[1], dir);
}
libgm::line_search_result<double> init(const vec_type& x, const vec_type& dir) {
libgm::line_search_result<double> result(0);
std::tie(result.value, result.slope) = value_slope(x, dir);
return result;
}
