org.jaitools.numeric
Enum Statistic

java.lang.Object
  java.lang.Enum<Statistic>
      org.jaitools.numeric.Statistic

All Implemented Interfaces:

Serializable, Comparable<Statistic>

public enum Statistic
extends Enum<Statistic>

Constants for the statistics supported by the SampleStats and StreamingSampleStats classes.

Since:

1.0

Version:

$Id$

Author:

Michael Bedward

Enum Constant Summary

APPROX_MEDIAN
Approximate median calculated with the 'remedian' algorithm of Rousseeuw et al.

MAX
Maximum sample value

MEAN
Arithmetic mean

MEDIAN
Exact median

MIN
Minimum sample value

RANGE
Range (maximum - minimum)

SDEV
Sample standard deviation

SUM
Sum of valid values

VARIANCE
Sample variance

Method Summary

static Statistic	get(String name) Gets a Statistic constant by name (case-insensitive).
String	getDescription() Returns a brief description of the statistic
boolean	supportsIntegralResult() Tests if this statistic can return an integral result when working with integral sample data.
String	toString() Returns the short name of this statistic
static Statistic	valueOf(String name) Returns the enum constant of this type with the specified name.
static Statistic[]	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, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

MEAN

public static final Statistic MEAN

Arithmetic mean

MEDIAN

public static final Statistic MEDIAN

Exact median

APPROX_MEDIAN

public static final Statistic APPROX_MEDIAN

Approximate median calculated with the 'remedian' algorithm of Rousseeuw et al. This is only used with StreamingSampleStats.

MIN

public static final Statistic MIN

Minimum sample value

MAX

public static final Statistic MAX

Maximum sample value

RANGE

public static final Statistic RANGE

Range (maximum - minimum)

SDEV

public static final Statistic SDEV

Sample standard deviation

SUM

public static final Statistic SUM

Sum of valid values

VARIANCE

public static final Statistic VARIANCE

Sample variance

Method Detail

values

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

Returns:

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

valueOf

public static Statistic 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

toString

public String toString()

Returns the short name of this statistic

Overrides:

toString in class Enum<Statistic>

getDescription

public String getDescription()

Returns a brief description of the statistic

Returns:

supportsIntegralResult

public boolean supportsIntegralResult()

Tests if this statistic can return an integral result when working with integral sample data.

Returns:

true if an integral result can be returned; false otherwise

get

public static Statistic get(String name)

Gets a Statistic constant by name (case-insensitive).

Parameters:

name - the statistic name

Returns:

a Statistic instance or null if the name was was not matched