public abstract class

BoxAndWhiskerCalculator

extends Object
java.lang.Object
   ↳ org.jfree.data.statistics.BoxAndWhiskerCalculator

Class Overview

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.

Summary

Public Constructors
BoxAndWhiskerCalculator()
Public Methods
static BoxAndWhiskerItem calculateBoxAndWhiskerStatistics(List values, boolean stripNullAndNaNItems)
Calculates the statistics required for a BoxAndWhiskerItem from a list of Number objects.
static BoxAndWhiskerItem calculateBoxAndWhiskerStatistics(List values)
Calculates the statistics required for a BoxAndWhiskerItem from a list of Number objects.
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.
[Expand]
Inherited Methods
From class java.lang.Object

Public Constructors

public BoxAndWhiskerCalculator ()

Public Methods

public static BoxAndWhiskerItem calculateBoxAndWhiskerStatistics (List values, boolean stripNullAndNaNItems)

Calculates the statistics required for a BoxAndWhiskerItem from a list of Number objects. Any items in the list that are null, not an instance of Number, or equivalent to Double.NaN, will be ignored.

Parameters
values a list of numbers (a null list is not permitted).
stripNullAndNaNItems a flag that controls the handling of null and NaN items.
Returns
  • A box-and-whisker item.

public static BoxAndWhiskerItem calculateBoxAndWhiskerStatistics (List values)

Calculates the statistics required for a BoxAndWhiskerItem from a list of Number objects. Any items in the list that are null, not an instance of Number, or equivalent to Double.NaN, will be ignored.

Parameters
values a list of numbers (a null list is not permitted).
Returns
  • A box-and-whisker item.

public static double calculateQ1 (List values)

Calculates the first quartile for a list of numbers in ascending order. If the items in the list are not in ascending order, the result is unspecified. If the list contains items that are null, not an instance of Number, or equivalent to Double.NaN, the result is unspecified.

Parameters
values the numbers in ascending order (null not permitted).
Returns
  • The first quartile.

public static double calculateQ3 (List values)

Calculates the third quartile for a list of numbers in ascending order. If the items in the list are not in ascending order, the result is unspecified. If the list contains items that are null, not an instance of Number, or equivalent to Double.NaN, the result is unspecified.

Parameters
values the list of values (null not permitted).
Returns
  • The third quartile.