Nearest neighbor search with L_p distance. More...

#include <lmetric_search.hpp>

Public Types
using	NeighborSearchType = neighbor::NeighborSearch< neighbor::NearestNeighborSort, metric::LMetric< TPower, true > >

Public Member Functions
	LMetricSearch (const arma::mat &referenceSet)

void	Search (const arma::mat &query, const size_t k, arma::Mat< size_t > &neighbors, arma::mat &similarities)
	Given a set of query points, find the nearest k neighbors, and return similarites. More...

Detailed Description

template<int TPower>
class mlpack::cf::LMetricSearch< TPower >

Nearest neighbor search with L_p distance.

An example of how to use LMetricSearch in CF is shown below:

extern arma::mat data; // data is a (user, item, rating) table.
// Users for whom recommendations are generated.
extern arma::Col<size_t> users;
arma::Mat<size_t> recommendations; // Resulting recommendations.
CFType<> cf(data);
// Generate 10 recommendations for all users.
cf.template GetRecommendations<LMetricSearch<2>>(10, recommendations);

Template Parameters

TPower Power of metric.

Constructor & Destructor Documentation

◆ LMetricSearch()

template<int TPower>

mlpack::cf::LMetricSearch< TPower >::LMetricSearch ( const arma::mat & referenceSet )

inline

Parameters

referenceSet Set of reference points.

Member Function Documentation

◆ Search()

template<int TPower>

void mlpack::cf::LMetricSearch< TPower >::Search	(	const arma::mat &	query,
		const size_t	k,
		arma::Mat< size_t > &	neighbors,
		arma::mat &	similarities
	)

inline

Given a set of query points, find the nearest k neighbors, and return similarites.

Similarities are non-negative and no larger thant one.

Parameters

query	A set of query points.
k	Number of neighbors to search.
neighbors	Nearest neighbors.
similarities	Similarities between query point and its neighbors.

The documentation for this class was generated from the following file:

src/mlpack/methods/cf/neighbor_search_policies/lmetric_search.hpp

Public Types