Uses of Class
org.apache.datasketches.theta.Sketch

Packages that use Sketch

Package	Description
org.apache.datasketches	This package is the parent package for all sketch algorithms.
org.apache.datasketches.theta	The theta package contains all the sketch classes that are members of the Theta Sketch Framework.

Uses of Sketch in org.apache.datasketches

Methods in org.apache.datasketches with parameters of type Sketch

Modifier and Type	Method and Description
static double	BoundsOnRatiosInThetaSketchedSets.getEstimateOfBoverA(Sketch sketchA, Sketch sketchB) Gets the estimate for B over A
static double	BoundsOnRatiosInThetaSketchedSets.getLowerBoundForBoverA(Sketch sketchA, Sketch sketchB) Gets the approximate lower bound for B over A based on a 95% confidence interval
static double	BoundsOnRatiosInThetaSketchedSets.getUpperBoundForBoverA(Sketch sketchA, Sketch sketchB) Gets the approximate upper bound for B over A based on a 95% confidence interval

Uses of Sketch in org.apache.datasketches.theta

Subclasses of Sketch in org.apache.datasketches.theta

Modifier and Type	Class and Description
class	CompactSketch The parent class of all the CompactSketches.
class	SingleItemSketch
class	UpdateSketch The parent class for the Update Sketch families, such as QuickSelect and Alpha.

Methods in org.apache.datasketches.theta that return Sketch

Modifier and Type	Method and Description
static Sketch	Sketch.heapify(org.apache.datasketches.memory.Memory srcMem) Heapify takes the sketch image in Memory and instantiates an on-heap Sketch using the Default Update Seed.
static Sketch	Sketch.heapify(org.apache.datasketches.memory.Memory srcMem, long seed) Heapify takes the sketch image in Memory and instantiates an on-heap Sketch using the given seed.
static Sketch	Sketches.heapifySketch(org.apache.datasketches.memory.Memory srcMem) Ref: Sketch.heapify(Memory)
static Sketch	Sketches.heapifySketch(org.apache.datasketches.memory.Memory srcMem, long seed) Ref: Sketch.heapify(Memory, long)
static Sketch	Sketch.wrap(org.apache.datasketches.memory.Memory srcMem) Wrap takes the sketch image in Memory and refers to it directly.
static Sketch	Sketch.wrap(org.apache.datasketches.memory.Memory srcMem, long seed) Wrap takes the sketch image in Memory and refers to it directly.
static Sketch	Sketches.wrapSketch(org.apache.datasketches.memory.Memory srcMem) Ref: Sketch.wrap(Memory)
static Sketch	Sketches.wrapSketch(org.apache.datasketches.memory.Memory srcMem, long seed) Ref: Sketch.wrap(Memory, long)

Methods in org.apache.datasketches.theta with parameters of type Sketch

Modifier and Type	Method and Description
CompactSketch	AnotB.aNotB(Sketch a, Sketch b) Perform A-and-not-B set operation on the two given sketches and return the result as an ordered CompactSketch on the heap.
static CompactSketch	PairwiseSetOperations.aNotB(Sketch skA, Sketch skB) This implements a stateless, pair-wise A AND NOT B operation on Sketches that are either Heap-based or Direct.
abstract CompactSketch	AnotB.aNotB(Sketch a, Sketch b, boolean dstOrdered, org.apache.datasketches.memory.WritableMemory dstMem) Perform A-and-not-B set operation on the two given sketches and return the result as a CompactSketch.
static boolean	JaccardSimilarity.dissimilarityTest(Sketch measured, Sketch expected, double threshold) Tests dissimilarity of a measured Sketch against an expected Sketch.
static boolean	JaccardSimilarity.exactlyEqual(Sketch sketchA, Sketch sketchB) Returns true if the two given sketches have exactly the same hash values and the same theta values.
CompactSketch	Intersection.intersect(Sketch a, Sketch b) Perform intersect set operation on the two given sketch arguments and return the result as an ordered CompactSketch on the heap.
static CompactSketch	PairwiseSetOperations.intersect(Sketch skA, Sketch skB) This implements a stateless, pair-wise Intersect operation on sketches that are either Heap-based or Direct.
abstract CompactSketch	Intersection.intersect(Sketch a, Sketch b, boolean dstOrdered, org.apache.datasketches.memory.WritableMemory dstMem) Perform intersect set operation on the two given sketches and return the result as a CompactSketch.
static double[]	JaccardSimilarity.jaccard(Sketch sketchA, Sketch sketchB) Computes the Jaccard similarity ratio with upper and lower bounds.
static boolean	JaccardSimilarity.similarityTest(Sketch measured, Sketch expected, double threshold) Tests similarity of a measured Sketch against an expected Sketch.
abstract void	Intersection.update(Sketch sketchIn) Intersect the given sketch with the internal state.
abstract void	Union.update(Sketch sketchIn) Union the given on-heap sketch.
abstract void	AnotB.update(Sketch a, Sketch b) Perform A-and-not-B set operation on the two given sketches.