de.lmu.ifi.dbs.elki.math.linearalgebra.pca

Class AbstractCovarianceMatrixBuilder

java.lang.Object

de.lmu.ifi.dbs.elki.math.linearalgebra.pca.AbstractCovarianceMatrixBuilder

All Implemented Interfaces:

CovarianceMatrixBuilder

Direct Known Subclasses:

RANSACCovarianceMatrixBuilder, StandardCovarianceMatrixBuilder, WeightedCovarianceMatrixBuilder

public abstract class AbstractCovarianceMatrixBuilder
extends Object
implements CovarianceMatrixBuilder

Abstract class with the task of computing a Covariance matrix to be used in PCA. Mostly the specification of an interface.

Author:

Erich Schubert

Constructor Summary

Constructors

Constructor and Description
AbstractCovarianceMatrixBuilder()

Method Summary

Modifier and Type	Method and Description
Matrix	processDatabase(Relation<? extends NumberVector> database) Compute Covariance Matrix for a complete database.
abstract Matrix	processIds(DBIDs ids, Relation<? extends NumberVector> database) Compute Covariance Matrix for a collection of database IDs.
Matrix	processQueryResults(DoubleDBIDList results, Relation<? extends NumberVector> database) Compute Covariance Matrix for a QueryResult Collection.
Matrix	processQueryResults(DoubleDBIDList results, Relation<? extends NumberVector> database, int k) Compute Covariance Matrix for a QueryResult Collection.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractCovarianceMatrixBuilder

public AbstractCovarianceMatrixBuilder()

Method Detail

processDatabase

public Matrix processDatabase(Relation<? extends NumberVector> database)

Description copied from interface: CovarianceMatrixBuilder

Compute Covariance Matrix for a complete database.

Specified by:

processDatabase in interface CovarianceMatrixBuilder

Parameters:

database - the database used

Returns:

Covariance Matrix

processIds

public abstract Matrix processIds(DBIDs ids,
                                  Relation<? extends NumberVector> database)

Description copied from interface: CovarianceMatrixBuilder

Compute Covariance Matrix for a collection of database IDs.

Specified by:

processIds in interface CovarianceMatrixBuilder

Parameters:

ids - a collection of ids

database - the database used

Returns:

Covariance Matrix

processQueryResults

public Matrix processQueryResults(DoubleDBIDList results,
                                  Relation<? extends NumberVector> database,
                                  int k)

Description copied from interface: CovarianceMatrixBuilder

Compute Covariance Matrix for a QueryResult Collection. By default it will just collect the ids and run processIds

Specified by:

processQueryResults in interface CovarianceMatrixBuilder

Parameters:

results - a collection of QueryResults

database - the database used

k - the number of entries to process

Returns:

Covariance Matrix

processQueryResults

public final Matrix processQueryResults(DoubleDBIDList results,
                                        Relation<? extends NumberVector> database)

Description copied from interface: CovarianceMatrixBuilder

Compute Covariance Matrix for a QueryResult Collection. By default it will just collect the ids and run processIds

Specified by:

processQueryResults in interface CovarianceMatrixBuilder

Parameters:

results - a collection of QueryResults

database - the database used

Returns:

Covariance Matrix