Distance#

This page provides C++ class references for the publicly-exposed elements of the raft/distance package. RAFT’s distances have been highly optimized and support a wide assortment of different distance measures.

Distance Types#

#include <raft/distance/distance_types.hpp>

namespace raft::distance

enum raft::distance::DistanceType#

enum to tell how to compute distance

Values:

enumerator L2Expanded#: evaluate as dist_ij = sum(x_ik^2) + sum(y_ij)^2 - 2*sum(x_ik * y_jk)

enumerator L2SqrtExpanded#: same as above, but inside the epilogue, perform square root operation

enumerator CosineExpanded#: cosine distance

enumerator L1#: L1 distance

enumerator L2Unexpanded#: evaluate as dist_ij += (x_ik - y-jk)^2

enumerator L2SqrtUnexpanded#: same as above, but inside the epilogue, perform square root operation

enumerator InnerProduct#: basic inner product

enumerator Linf#: Chebyshev (Linf) distance

enumerator Canberra#: Canberra distance

enumerator LpUnexpanded#: Generalized Minkowski distance

enumerator CorrelationExpanded#: Correlation distance

enumerator JaccardExpanded#: Jaccard distance

enumerator HellingerExpanded#: Hellinger distance

enumerator Haversine#: Haversine distance

enumerator BrayCurtis#: Bray-Curtis distance

enumerator JensenShannon#: Jensen-Shannon distance

enumerator HammingUnexpanded#: Hamming distance

enumerator KLDivergence#: KLDivergence

enumerator RusselRaoExpanded#: RusselRao

enumerator DiceExpanded#: Dice-Sorensen distance

enumerator Precomputed#: Precomputed (special value)

Contents: