Module datarush.analytics

Package com.pervasive.datarush.analytics.cluster

Enum AggregationFunctionConstants

java.lang.Object

java.lang.Enum<AggregationFunctionConstants>

com.pervasive.datarush.analytics.cluster.AggregationFunctionConstants

All Implemented Interfaces:

AggregationFunction, Serializable, Comparable<AggregationFunctionConstants>

public enum AggregationFunctionConstants
extends Enum<AggregationFunctionConstants>
implements AggregationFunction

This enumeration contains implementations of AggregationFunctions that correspond to the aggregation functions for clustering models in the PMML specification.

Enum Constant Summary

Enum Constants

Enum Constant	Description
binarySimilarity
chebychev
cityBlock
euclidean
jaccard
minkowski
simpleMatching
squaredEuclidean
tanimoto

Method Summary

Modifier and Type	Method	Description
double	apply(CompareFunction[] compareFunctions, double[] cluster, double[] data, double[] fieldWeights, double[] missingValueWeights, double[] similarityScales, double pParameter)	Applies this AggregationFunction.
static AggregationFunctionConstants	valueOf(String name)	Returns the enum constant of this type with the specified name.
static AggregationFunctionConstants[]	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

Methods inherited from interface com.pervasive.datarush.analytics.cluster.AggregationFunction

is, name

Enum Constant Detail

euclidean

public static final AggregationFunctionConstants euclidean

squaredEuclidean

public static final AggregationFunctionConstants squaredEuclidean

chebychev

public static final AggregationFunctionConstants chebychev

cityBlock

public static final AggregationFunctionConstants cityBlock

minkowski

public static final AggregationFunctionConstants minkowski

simpleMatching

public static final AggregationFunctionConstants simpleMatching

jaccard

public static final AggregationFunctionConstants jaccard

tanimoto

public static final AggregationFunctionConstants tanimoto

binarySimilarity

public static final AggregationFunctionConstants binarySimilarity

Method Detail

values

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

Returns:

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

valueOf

public static AggregationFunctionConstants 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

apply

public double apply(CompareFunction[] compareFunctions,
                    double[] cluster,
                    double[] data,
                    double[] fieldWeights,
                    double[] missingValueWeights,
                    double[] similarityScales,
                    double pParameter)

Description copied from interface: AggregationFunction

Applies this AggregationFunction. Computes the distance/similarity of two vectors. Compare function, field weights, missing value weights and similarity scales at index i must correspond to cluster and data vector values at the same index.

Specified by:

apply in interface AggregationFunction

Parameters:

compareFunctions - the CompareFunctions to measure distance/similarity between the vectors

cluster - the cluster seeds

data - the data vector

fieldWeights - field weights for each field/its values

missingValueWeights - missing value weights for each field/its values

similarityScales - similarity scales for each field/its values

pParameter - the p-parameter, only used by the Minkowski function

Returns:

the aggregation value computed by this function