org.apache.commons.math4.stat.ranking

## Enum NaNStrategy

• All Implemented Interfaces:
Serializable, Comparable<NaNStrategy>

public enum NaNStrategy
extends 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.
• FAILED - If any NaN is encountered in the input array, an appropriate exception is thrown
Since:
2.0
• ### 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
• #### FAILED

public static final NaNStrategy FAILED
NaNs result in an exception
Since:
3.1
• ### 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(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:
IllegalArgumentException - if this enum type has no constant with the specified name
NullPointerException - if the argument is null

Copyright © 2003–2016 The Apache Software Foundation. All rights reserved.