org.apache.jorphan.math
Class StatCalculator

java.lang.Object
  org.apache.jorphan.math.StatCalculator

public class StatCalculator

extends Object

This class serves as a way to calculate the median of a list of values. It is not threadsafe.

Constructor Summary

StatCalculator()

Method Summary

void	addAll(StatCalculator calc)
void	addBytes(long newValue)
void	addValue(double newValue)
void	addValue(float newValue)
void	addValue(int newValue)
void	addValue(long newValue)
void	addValue(Number val)
void	clear()
int	getCount()
HashMap	getDistribution() The method has a limit of 1% as the finest granularity.
Number	getMax()
double	getMean()
Number	getMedian()
Number	getMin()
Number	getPercentPoint(double percent) Get the value which %percent% of the values are less than.
Number	getPercentPoint(float percent) Get the value which %percent% of the values are less than.
double	getStandardDeviation()
long	getTotalBytes()

Methods inherited from class java.lang.Object

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

Constructor Detail

StatCalculator

public StatCalculator()

Method Detail

clear

public void clear()

addValue

public void addValue(long newValue)

addValue

public void addValue(int newValue)

addValue

public void addValue(float newValue)

addValue

public void addValue(double newValue)

addBytes

public void addBytes(long newValue)

addAll

public void addAll(StatCalculator calc)

getMedian

public Number getMedian()

getTotalBytes

public long getTotalBytes()

getPercentPoint

public Number getPercentPoint(float percent)

Get the value which %percent% of the values are less than. This works just like median (where median represents the 50% point). A typical desire is to see the 90% point - the value that 90% of the data points are below, the remaining 10% are above.

Parameters:

percent -

Returns:

number of values less than the percentage

getPercentPoint

public Number getPercentPoint(double percent)

Get the value which %percent% of the values are less than. This works just like median (where median represents the 50% point). A typical desire is to see the 90% point - the value that 90% of the data points are below, the remaining 10% are above.

Parameters:

percent -

Returns:

number of values less than the percentage

getDistribution

public HashMap getDistribution()

The method has a limit of 1% as the finest granularity. We do this to make sure we get a whole number for iterating.

getMean

public double getMean()

getStandardDeviation

public double getStandardDeviation()

getMin

public Number getMin()

getMax

public Number getMax()

getCount

public int getCount()

addValue

public void addValue(Number val)