mobios.index.algorithms
Enum PivotSelectionMethods

java.lang.Object
  java.lang.Enum<PivotSelectionMethods>
      mobios.index.algorithms.PivotSelectionMethods

All Implemented Interfaces:

Serializable, Comparable<PivotSelectionMethods>, PivotSelectionMethod

public enum PivotSelectionMethods
extends Enum<PivotSelectionMethods>
implements PivotSelectionMethod

All the built-in pivot selection methods. FFT: use Farthest-First-Traversal to find the corners of the data. Linear time. CENTER: choose the centers of the internal clusters, a method similar to CLARA. Slow RANDOM: select pivots randomly, first, but no performance guarantee. FFTANDPCA: a combination of FFT and Principal Component Analysis. Slow, but performs the best

Version:

2006.08.03

Author:

Rui Mao, Willlard

Enum Constant Summary

CENTER

EPCAF

FFT

PCA

PCAONFFT

RANDOM

Method Summary

static PivotSelectionMethods	valueOf(String name) Returns the enum constant of this type with the specified name.
static PivotSelectionMethods[]	values() Returns an array containing the constants of this enum type, in the order they're 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

Methods inherited from interface mobios.index.algorithms.PivotSelectionMethod

selectPivots, selectPivots

Enum Constant Detail

FFT

public static final PivotSelectionMethods FFT

CENTER

public static final PivotSelectionMethods CENTER

RANDOM

public static final PivotSelectionMethods RANDOM

PCA

public static final PivotSelectionMethods PCA

PCAONFFT

public static final PivotSelectionMethods PCAONFFT

EPCAF

public static final PivotSelectionMethods EPCAF

Method Detail

values

public static final PivotSelectionMethods[] values()

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

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

Returns:

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

valueOf

public static PivotSelectionMethods 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