de.jungblut.utils

Class Statistics

java.lang.Object

de.jungblut.utils.Statistics

All Implemented Interfaces:

org.apache.hadoop.io.Writable

public final class Statistics
extends Object
implements org.apache.hadoop.io.Writable

Small statistics utility to describe data based on its min/max/mean/median/deviation.

Author:

thomas.jungblut

Constructor Summary

Constructors

Constructor and Description
Statistics()

Method Summary

Modifier and Type	Method and Description
void	add(double item) Adds a new data item into the current statistics object.
void	finalizeComputation() Finalize the computation to calculate the mean/median and deviation.
double	getCoefficientOfVariation()
int	getCount()
double	getDispersionIndex()
double	getMax()
double	getMean()
double	getMedian()
double	getMin()
double	getSignalToNoise()
double	getStandardDeviation()
double	getSum()
double	getVariance()
void	readFields(DataInput in)
String	toString()
void	write(DataOutput out)

Methods inherited from class java.lang.Object

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

Constructor Detail

Statistics

public Statistics()

Method Detail

add

public void add(double item)

Adds a new data item into the current statistics object.

Parameters:

item - a normal double value.

finalizeComputation

public void finalizeComputation()

Finalize the computation to calculate the mean/median and deviation.

write

public void write(DataOutput out)
           throws IOException

Specified by:

write in interface org.apache.hadoop.io.Writable

Throws:

IOException

readFields

public void readFields(DataInput in)
                throws IOException

Specified by:

readFields in interface org.apache.hadoop.io.Writable

Throws:

IOException

getMin

public double getMin()

getMax

public double getMax()

getMedian

public double getMedian()

getMean

public double getMean()

getStandardDeviation

public double getStandardDeviation()

getVariance

public double getVariance()

getSignalToNoise

public double getSignalToNoise()

getDispersionIndex

public double getDispersionIndex()

getCoefficientOfVariation

public double getCoefficientOfVariation()

getSum

public double getSum()

getCount

public int getCount()

toString

public String toString()

Overrides:

toString in class Object