Parametrized Constructor

API Definition

KBest(int dim, int R, int L, int A, const char *metric, const std::string &init_builder_type);

KBest(int dim, int R, int L, float A, int graph_opt_iter, const std::string &metric, const std::string &init_builder_type, const std::string &index_type);

Function

Initializes the build of graph search.

Parameters

Parameter	Data Type	Description	Value Range
dim	int	Feature dimension.	[1, 2999]
R	int	Number of neighboring nodes.	[11, 499]
L	int	Size of the candidate node list during the graph build.	[11, 1999]
A	int	Angle threshold during the pruning of graph build.	[11,360]
metric	const char *	Distance measurement indicator.	L2 or IP. L2 indicates the Euclidean distance. IP indicates the inner product distance.
init_builder_type	const std::string &	Algorithm for building the k-nearest neighbor graph.	RNNDescent and NNDescent indicate two different algorithms for building the k-nearest neighbor graph. RNNDescent is often used.
graph_opt_iter	int	Number of rounds for graph index self-iteration.	[0, 30]
index_type	const std::string &	Neighbor selection strategy.	HNSW, NSG, TSDG, and SSG indicate the four different neighbor selection strategies.

Parent topic: C++