Package com.tdunning.math.stats

Class AbstractTDigest

java.lang.Object

com.tdunning.math.stats.TDigest

com.tdunning.math.stats.AbstractTDigest

Direct Known Subclasses:

ArrayDigest, AVLTreeDigest, TreeDigest

public abstract class AbstractTDigest
extends TDigest

Field Summary

Fields

Modifier and Type	Field	Description
protected java.util.Random	gen
protected boolean	recordAllData

Constructor Summary

Constructors

Constructor	Description
AbstractTDigest()

Method Summary

Modifier and Type	Method	Description
void	add(double x)	Adds a sample to a histogram.
void	add(TDigest other)	Add all of the centroids of another TDigest to this one.
abstract void	compress(GroupTree other)
protected Centroid	createCentroid(double mean, int id)
static int	decode(java.nio.ByteBuffer buf)
static void	encode(java.nio.ByteBuffer buf, int n)
static double	interpolate(double x, double x0, double x1)
boolean	isRecording()
protected static TDigest	merge(java.lang.Iterable<TDigest> subData, java.util.Random gen, TDigest r)
TDigest	recordAllData()	Sets up so that all centroids will record all data assigned to them.

Methods inherited from class com.tdunning.math.stats.TDigest

add, asBytes, asSmallBytes, byteSize, cdf, centroidCount, centroids, checkValue, compress, compression, createArrayDigest, createArrayDigest, createTreeDigest, quantile, size, smallByteSize

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

gen

protected java.util.Random gen

recordAllData

protected boolean recordAllData

Constructor Detail

AbstractTDigest

public AbstractTDigest()

Method Detail

interpolate

public static double interpolate(double x,
                                 double x0,
                                 double x1)

encode

public static void encode(java.nio.ByteBuffer buf,
                          int n)

decode

public static int decode(java.nio.ByteBuffer buf)

merge

protected static TDigest merge(java.lang.Iterable<TDigest> subData,
                               java.util.Random gen,
                               TDigest r)

compress

public abstract void compress(GroupTree other)

recordAllData

public TDigest recordAllData()

Sets up so that all centroids will record all data assigned to them. For testing only, really.

Specified by:

recordAllData in class TDigest

Returns:

This TDigest so that configurations can be done in fluent style.

isRecording

public boolean isRecording()

Specified by:

isRecording in class TDigest

add

public void add(double x)

Adds a sample to a histogram.

Specified by:

add in class TDigest

Parameters:

x - The value to add.

add

public void add(TDigest other)

Description copied from class: TDigest

Add all of the centroids of another TDigest to this one.

Specified by:

add in class TDigest

Parameters:

other - The other TDigest

createCentroid

protected Centroid createCentroid(double mean,
                                  int id)