org.tinfour.gwr

Enum BandwidthSelectionMethod

java.lang.Object

java.lang.Enum<BandwidthSelectionMethod>

org.tinfour.gwr.BandwidthSelectionMethod

All Implemented Interfaces:

Serializable, Comparable<BandwidthSelectionMethod>

public enum BandwidthSelectionMethod
extends Enum<BandwidthSelectionMethod>

Specify a method for selecting bandwidth for a Geographically Weighted Regression.

Enum Constant Summary

Enum Constants

Enum Constant and Description
FixedBandwidth Perform GWR using a specified bandwidth given in the same units as the horizontal coordinate system.
FixedProportionalBandwidth Perform GWR using a bandwidth that is a fixed proportion of the average distance from the query point for the set of local sample vertices used in the interpolation.
OptimalAICc Attempt to automatically select the bandwidth selection using the Akaike Information Criteria (corrected for sample size).
OrdinaryLeastSquares Perform the regression using a uniform weighting for all samples.

Method Summary

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

FixedBandwidth

public static final BandwidthSelectionMethod FixedBandwidth

Perform GWR using a specified bandwidth given in the same units as the horizontal coordinate system.

FixedProportionalBandwidth

public static final BandwidthSelectionMethod FixedProportionalBandwidth

Perform GWR using a bandwidth that is a fixed proportion of the average distance from the query point for the set of local sample vertices used in the interpolation.

OptimalAICc

public static final BandwidthSelectionMethod OptimalAICc

Attempt to automatically select the bandwidth selection using the Akaike Information Criteria (corrected for sample size). This technique performs multiple evaluations of the statistics for the samples in the vicinity of the query point using different bandwidth settings in an attempt to find an optimal fit. Because of the large amount of processing required by this procedure it is thus the slowest the available methods.

OrdinaryLeastSquares

public static final BandwidthSelectionMethod OrdinaryLeastSquares

Perform the regression using a uniform weighting for all samples. This method essentially selects an infinite bandwidth. This selection method is intended primarily for testing and software development purposes. The computation used for OLS is inefficient compared to conventional implementations.

Method Detail

values

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

Returns:

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

valueOf

public static BandwidthSelectionMethod 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