oracle.dmt.odm.model
Class NMFFeature

java.lang.Object
  |
  +--oracle.dmt.odm.model.NMFFeature

All Implemented Interfaces:

Feature

public class NMFFeature

extends java.lang.Object

implements Feature

The feature is an entity that consists of multiple attributes. A set of features expresses a data mining object. Each feature has an identifier which is a consecutive numbering scheme starting at number 1 to uniquely identify the resultant features. Each resultant feature is composed of M entries, where M is the number of attributes in the original data set. Each entry consists of three components: attribute ID, value, and coefficient. The resultant features can be viewed as an aggregate of all the original attributes. The difference among the features is the predominance of each of the attributes in the feature that is represented by the coefficient. If an attribute is highly predominant, its coefficient will be high. The coefficients are non-negative. The value differentiates between numeric and categorical data. The value for numeric data is NULL; for categorical data it is the value from the original data set.

Method Summary

java.lang.Float	getCoefficient(int entryId) Returns the coefficient of the specified feature entry.
FeatureEntry[]	getFeatureEntries() Returns an array of feature entries in the feature.
FeatureEntry	getFeatureEntry(int entryId) Returns the value of the specified entry.
int	getFeatureId() Returns the feature identifier.
java.lang.String	getValue(int entryId) Returns the value of the specified entry.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getFeatureId

public int getFeatureId()

Returns the feature identifier.

Specified by:

getFeatureId in interface Feature

Returns:

The feature identifier

getFeatureEntries

public FeatureEntry[] getFeatureEntries()

Returns an array of feature entries in the feature.

Specified by:

getFeatureEntries in interface Feature

Returns:

An array of feature entries in the feature

getFeatureEntry

public FeatureEntry getFeatureEntry(int entryId)
                                                  throws InvalidArgumentException

Returns the value of the specified entry.

Specified by:

getFeatureEntry in interface Feature

Returns:

The value of the specified entry

InvalidArgumentException

getValue

public java.lang.String getValue(int entryId)
                          throws InvalidArgumentException

Returns the value of the specified entry.

Returns:

The value of the specified entry

InvalidArgumentException

getCoefficient

public java.lang.Float getCoefficient(int entryId)
                               throws InvalidArgumentException

Returns the coefficient of the specified feature entry.

Returns:

The coefficient of the specified feature entry

InvalidArgumentException