search

package
v0.4.5 Latest Latest
Warning

This package is not in the latest version of its module.

 Go to latest Published: Jul 9, 2022 License: Apache-2.0 Imports: 20 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	DefaultTestSize = 1000
	DefaultMaxIter  = 100
)

Variables

This section is empty.

Functions

func EstimateHNSWBuilderComplexity added in v0.4.5 

func EstimateHNSWBuilderComplexity(dataSize, trials int) int

func EstimateIVFBuilderComplexity added in v0.4.5 

func EstimateIVFBuilderComplexity(num, numEpoch int) int

Types

type Bruteforce 

type Bruteforce struct {
	// contains filtered or unexported fields
}

Bruteforce is a naive implementation of vector index.

func NewBruteforce 

func NewBruteforce(vectors []Vector) *Bruteforce

NewBruteforce creates a Bruteforce vector index.

func (*Bruteforce) Build 

func (b *Bruteforce) Build()

Build a vector index on data.

func (*Bruteforce) MultiSearch 

func (b *Bruteforce) MultiSearch(q Vector, terms []string, n int, prune0 bool) (values map[string][]int32, scores map[string][]float32)

func (*Bruteforce) Search 

func (b *Bruteforce) Search(q Vector, n int, prune0 bool) (values []int32, scores []float32)

Search top-k similar vectors.

type CentroidVector added in v0.4.2 

type CentroidVector interface {
	Distance(vector Vector) float32
}

type DenseVector 

type DenseVector struct {
	// contains filtered or unexported fields
}

func NewDenseVector 

func NewDenseVector(data []float32, terms []string, isHidden bool) *DenseVector

func (*DenseVector) Centroid added in v0.4.2 

func (v *DenseVector) Centroid(_ []Vector, _ []int32) CentroidVector

func (*DenseVector) Distance 

func (v *DenseVector) Distance(vector Vector) float32

func (*DenseVector) IsHidden 

func (v *DenseVector) IsHidden() bool

func (*DenseVector) Terms 

func (v *DenseVector) Terms() []string

type DictionaryCentroidVector added in v0.4.2 

type DictionaryCentroidVector struct {
	// contains filtered or unexported fields
}

func (*DictionaryCentroidVector) Distance added in v0.4.2 

func (v *DictionaryCentroidVector) Distance(vector Vector) float32

type DictionaryVector 

type DictionaryVector struct {
	// contains filtered or unexported fields
}

func NewDictionaryVector 

func NewDictionaryVector(indices []int32, values []float32, terms []string, isHidden bool) *DictionaryVector

func (DictionaryVector) Centroid added in v0.4.2 

func (v DictionaryVector) Centroid(vectors []Vector, indices []int32) CentroidVector

func (*DictionaryVector) Distance 

func (v *DictionaryVector) Distance(vector Vector) float32

func (*DictionaryVector) Dot 

func (v *DictionaryVector) Dot(vector *DictionaryVector) (float32, float32)

func (*DictionaryVector) IsHidden 

func (v *DictionaryVector) IsHidden() bool

func (*DictionaryVector) Terms 

func (v *DictionaryVector) Terms() []string

type HNSW 

type HNSW struct {
	// contains filtered or unexported fields
}

HNSW is a vector index based on Hierarchical Navigable Small Worlds.

func NewHNSW 

func NewHNSW(vectors []Vector, configs ...HNSWConfig) *HNSW

NewHNSW builds a vector index based on Hierarchical Navigable Small Worlds.

func (*HNSW) Build 

func (h *HNSW) Build()

Build a vector index on data.

func (*HNSW) MultiSearch 

func (h *HNSW) MultiSearch(q Vector, terms []string, n int, prune0 bool) (values map[string][]int32, scores map[string][]float32)

func (*HNSW) Search 

func (h *HNSW) Search(q Vector, n int, prune0 bool) (values []int32, scores []float32)

Search a vector in Hierarchical Navigable Small Worlds.

type HNSWBuilder 

type HNSWBuilder struct {
	// contains filtered or unexported fields
}

func NewHNSWBuilder 

func NewHNSWBuilder(data []Vector, k, numJobs int) *HNSWBuilder

func (*HNSWBuilder) Build 

func (b *HNSWBuilder) Build(recall float32, trials int, prune0 bool, t *task.Task) (idx *HNSW, score float32)

type HNSWConfig 

type HNSWConfig func(*HNSW)

HNSWConfig is the configuration function for HNSW.

func SetEFConstruction 

func SetEFConstruction(efConstruction int) HNSWConfig

SetEFConstruction sets efConstruction in HNSW.

func SetHNSWNumJobs 

func SetHNSWNumJobs(numJobs int) HNSWConfig

SetHNSWNumJobs sets the number of jobs for building index.

func SetMaxConnection 

func SetMaxConnection(maxConnection int) HNSWConfig

SetMaxConnection sets the number of connections in HNSW.

type IVF 

type IVF struct {
	// contains filtered or unexported fields
}

func NewIVF 

func NewIVF(vectors []Vector, configs ...IVFConfig) *IVF

func (*IVF) Build 

func (idx *IVF) Build()

func (*IVF) MultiSearch 

func (idx *IVF) MultiSearch(q Vector, terms []string, n int, prune0 bool) (values map[string][]int32, scores map[string][]float32)

func (*IVF) Search 

func (idx *IVF) Search(q Vector, n int, prune0 bool) (values []int32, scores []float32)

type IVFBuilder 

type IVFBuilder struct {
	// contains filtered or unexported fields
}

func NewIVFBuilder 

func NewIVFBuilder(data []Vector, k int, configs ...IVFConfig) *IVFBuilder

func (*IVFBuilder) Build 

func (b *IVFBuilder) Build(recall float32, numEpoch int, prune0 bool, t *task.Task) (idx *IVF, score float32)

type IVFConfig 

type IVFConfig func(ivf *IVF)

func SetClusterErrorRate 

func SetClusterErrorRate(errorRate float32) IVFConfig

func SetIVFNumJobs 

func SetIVFNumJobs(numJobs int) IVFConfig

func SetMaxIteration added in v0.4.5 

func SetMaxIteration(maxIter int) IVFConfig

func SetNumProbe 

func SetNumProbe(numProbe int) IVFConfig

type Vector 

type Vector interface {
	Distance(vector Vector) float32
	Terms() []string
	IsHidden() bool
	Centroid(vectors []Vector, indices []int32) CentroidVector
}

type VectorIndex 

type VectorIndex interface {
	Build()
	Search(q Vector, n int, prune0 bool) ([]int32, []float32)
	MultiSearch(q Vector, terms []string, n int, prune0 bool) (map[string][]int32, map[string][]float32)
}

Source Files

View all Source files

Jump to

Keyboard shortcuts

? : This menu
/ : Search site
f or F : Jump to
y or Y : Canonical URL
go.dev uses cookies from Google to deliver and enhance the quality of its services and to analyze traffic. Learn more.