org.apache.commons.math.stat.ranking

Enum NaNStrategy

java.lang.Object

java.lang.Enum<NaNStrategy>

org.apache.commons.math.stat.ranking.NaNStrategy

All Implemented Interfaces:

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

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

Strategies for handling NaN values in rank transformations.

• MINIMAL - NaNs are treated as minimal in the ordering, equivalent to (that is, tied with) Double.NEGATIVE_INFINITY.
• MAXIMAL - NaNs are treated as maximal in the ordering, equivalent to Double.POSITIVE_INFINITY
• REMOVED - NaNs are removed before the rank transform is applied
• FIXED - NaNs are left "in place," that is the rank transformation is applied to the other elements in the input array, but the NaN elements are returned unchanged.

Since:

2.0

Enum Constant Summary

Enum Constants

Enum Constant and Description
FIXED NaNs are left in place
MAXIMAL NaNs are considered maximal in the ordering
MINIMAL NaNs are considered minimal in the ordering
REMOVED NaNs are removed before computing ranks

Method Summary

Modifier and Type	Method and Description
static NaNStrategy	valueOf(java.lang.String name) Returns the enum constant of this type with the specified name.
static NaNStrategy[]	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

MINIMAL

public static final NaNStrategy MINIMAL

NaNs are considered minimal in the ordering

MAXIMAL

public static final NaNStrategy MAXIMAL

NaNs are considered maximal in the ordering

REMOVED

public static final NaNStrategy REMOVED

NaNs are removed before computing ranks

FIXED

public static final NaNStrategy FIXED

NaNs are left in place

Method Detail

values

public static NaNStrategy[] 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 (NaNStrategy c : NaNStrategy.values())
    System.out.println(c);

Returns:

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

valueOf

public static NaNStrategy 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