org.openjdk.jmc.common.item

Class Aggregators.VarianceConsumer

java.lang.Object

org.openjdk.jmc.common.item.Aggregators.VarianceConsumer

All Implemented Interfaces:

IItemConsumer<Aggregators.VarianceConsumer>

Enclosing class:

Aggregators

public static class Aggregators.VarianceConsumer
extends Object

Consumer for calculating stddev and variance in a one pass, numerically stable way.

Field Summary

Fields

Modifier and Type	Field and Description
double	M2
double	mean
long	n
IUnit	unit

Constructor Summary

Constructors

Constructor and Description
VarianceConsumer(IMemberAccessor<? extends IQuantity,IItem> accessor)

Method Summary

Modifier and Type	Method and Description
void	consume(IItem item) Consumes another item.
Number	getStddev(boolean besselCorrection)
Number	getVariance(boolean besselCorrection)
Aggregators.VarianceConsumer	merge(Aggregators.VarianceConsumer other) Merges this object with the supplied object.

Methods inherited from class java.lang.Object

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

Field Detail

n

public long n

mean

public double mean

M2

public double M2

unit

public IUnit unit

Constructor Detail

VarianceConsumer

public VarianceConsumer(IMemberAccessor<? extends IQuantity,IItem> accessor)

Method Detail

getVariance

public Number getVariance(boolean besselCorrection)

getStddev

public Number getStddev(boolean besselCorrection)

consume

public void consume(IItem item)

Description copied from interface: IItemConsumer

Consumes another item.

merge

public Aggregators.VarianceConsumer merge(Aggregators.VarianceConsumer other)

Description copied from interface: IItemConsumer

Merges this object with the supplied object. Normally this is another item consumer of the same type and the output result is a consumer with an internal state that reflects the state of both the current consumer and the input value.

Parameters:

other - another instance to merge with

Returns:

the merged instance