org.apache.commons.math.stat.ranking

Enum TiesStrategy

java.lang.Object

java.lang.Enum<TiesStrategy>

org.apache.commons.math.stat.ranking.TiesStrategy

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<TiesStrategy>

public enum TiesStrategy
extends java.lang.Enum<TiesStrategy>

Strategies for handling tied values in rank transformations.

• SEQUENTIAL - Ties are assigned ranks in order of occurrence in the original array, for example (1,3,4,3) is ranked as (1,2,4,3)
• MINIMUM - Tied values are assigned the minimum applicable rank, or the rank of the first occurrence. For example, (1,3,4,3) is ranked as (1,2,4,2)
• MAXIMUM - Tied values are assigned the maximum applicable rank, or the rank of the last occurrence. For example, (1,3,4,3) is ranked as (1,3,4,3)
• AVERAGE - Tied values are assigned the average of the applicable ranks. For example, (1,3,4,3) is ranked as (1,2.5,4,2.5)
• RANDOM - Tied values are assigned a random integer rank from among the applicable values. The assigned rank will always be an integer, (inclusively) between the values returned by the MINIMUM and MAXIMUM strategies.

Since:

2.0

Enum Constant Summary

Enum Constants

Enum Constant and Description
AVERAGE Ties get the average of applicable ranks
MAXIMUM Ties get the maximum applicable rank
MINIMUM Ties get the minimum applicable rank
RANDOM Ties get a random integral value from among applicable ranks
SEQUENTIAL Ties assigned sequential ranks in order of occurrence

Method Summary

Modifier and Type	Method and Description
static TiesStrategy	valueOf(java.lang.String name) Returns the enum constant of this type with the specified name.
static TiesStrategy[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

compareTo, equals, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

SEQUENTIAL

public static final TiesStrategy SEQUENTIAL

Ties assigned sequential ranks in order of occurrence

MINIMUM

public static final TiesStrategy MINIMUM

Ties get the minimum applicable rank

MAXIMUM

public static final TiesStrategy MAXIMUM

Ties get the maximum applicable rank

AVERAGE

public static final TiesStrategy AVERAGE

Ties get the average of applicable ranks

RANDOM

public static final TiesStrategy RANDOM

Ties get a random integral value from among applicable ranks

Method Detail

values

public static TiesStrategy[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (TiesStrategy c : TiesStrategy.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static TiesStrategy valueOf(java.lang.String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

java.lang.IllegalArgumentException - if this enum type has no constant with the specified name

java.lang.NullPointerException - if the argument is null