org.apache.hadoop.mapreduce.v2.app.speculate

Class DataStatistics

java.lang.Object

org.apache.hadoop.mapreduce.v2.app.speculate.DataStatistics

public class DataStatistics
extends Object

Constructor Summary

Constructors

Constructor and Description
DataStatistics()
DataStatistics(double initNum)

Method Summary

Modifier and Type	Method and Description
void	add(double newNum)
double	count()
double	mean()
double	meanCI() calculates the mean value within 95% ConfidenceInterval.
double	outlier(float sigma)
double	std()
String	toString()
void	updateStatistics(double old, double update)
double	var()

Methods inherited from class java.lang.Object

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

Constructor Detail

DataStatistics

public DataStatistics()

DataStatistics

public DataStatistics(double initNum)

Method Detail

add

public void add(double newNum)

updateStatistics

public void updateStatistics(double old,
                             double update)

mean

public double mean()

var

public double var()

std

public double std()

outlier

public double outlier(float sigma)

count

public double count()

meanCI

public double meanCI()

calculates the mean value within 95% ConfidenceInterval. 1.96 is standard for 95 %

Returns:

the mean value adding 95% confidence interval

toString

public String toString()

Overrides:

toString in class Object