Package org.jfree.data.statistics

Class BoxAndWhiskerCalculator

java.lang.Object

org.jfree.data.statistics.BoxAndWhiskerCalculator

public abstract class BoxAndWhiskerCalculator
extends Object

A utility class that calculates the mean, median, quartiles Q1 and Q3, plus a list of outlier values...all from an arbitrary list of Number objects.

Constructor Summary

Constructors

Constructor	Description
BoxAndWhiskerCalculator()

Method Summary

Modifier and Type	Method	Description
static BoxAndWhiskerItem	calculateBoxAndWhiskerStatistics(List values)	Calculates the statistics required for a BoxAndWhiskerItem.
static double	calculateMean(List values)	Deprecated. This method has been moved to the Statistics class.
static double	calculateMedian(List values)	Deprecated. Moved to the Statistics class.
static double	calculateMedian(List values, int start, int end)	Deprecated. Moved to the Statistics class.
static double	calculateQ1(List values)	Calculates the first quartile for a list of numbers in ascending order.
static double	calculateQ3(List values)	Calculates the third quartile for a list of numbers in ascending order.

Methods inherited from class java.lang.Object

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

Constructor Details

BoxAndWhiskerCalculator

public BoxAndWhiskerCalculator()

Method Details

calculateBoxAndWhiskerStatistics

public static BoxAndWhiskerItem calculateBoxAndWhiskerStatistics(List values)

Calculates the statistics required for a BoxAndWhiskerItem.

Any items in the list that are not instances of the Number class are ignored. Likewise, null values are ignored.

Parameters:

values - A list of numbers (a null list is not permitted).

Returns:

Box-and-whisker statistics.

calculateQ1

public static double calculateQ1(List values)

Calculates the first quartile for a list of numbers in ascending order.

Parameters:

values - the numbers in ascending order.

Returns:

The first quartile.

calculateQ3

public static double calculateQ3(List values)

Calculates the third quartile for a list of numbers in ascending order.

Parameters:

values - the list of values.

Returns:

The third quartile.

calculateMean

public static double calculateMean(List values)

Deprecated.

This method has been moved to the Statistics class.

Returns the mean of a list of numbers.

Parameters:

values - a list of numbers.

Returns:

The mean.

calculateMedian

public static double calculateMedian(List values)

Deprecated.

Moved to the Statistics class.

Calculates the median for a list of values (Number objects) that are in ascending order.

Parameters:

values - the values in ascending order.

Returns:

The median.

calculateMedian

public static double calculateMedian(List values,
int start,
int end)

Deprecated.

Moved to the Statistics class.

Calculates the median for a sublist within a list of values (Number objects) that are in ascending order.

Parameters:

values - the values in ascending order.

start - the start index.

end - the end index.

Returns:

The median.