org.apache.commons.math3.stat.ranking

## Enum NaNStrategy

- java.lang.Object
- - java.lang.Enum<NaNStrategy>
  - - org.apache.commons.math3.stat.ranking.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 Summary

    Enum Constants
    Enum Constant and Description
    `FAILED` NaNs result in an exception
    `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

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `static NaNStrategy` | `valueOf(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

      `clone, compareTo, equals, finalize, 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

    - #### 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

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