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

Class AbstractCovarianceMatrixBuilder<V extends NumberVector<?>>

java.lang.Object

de.lmu.ifi.dbs.elki.math.linearalgebra.pca.AbstractCovarianceMatrixBuilder<V>

Type Parameters:

V - Vector class in use

All Implemented Interfaces:

CovarianceMatrixBuilder<V>, Parameterizable

Direct Known Subclasses:

RANSACCovarianceMatrixBuilder, StandardCovarianceMatrixBuilder, WeightedCovarianceMatrixBuilder

public abstract class AbstractCovarianceMatrixBuilder<V extends NumberVector<?>>
extends Object
implements Parameterizable, CovarianceMatrixBuilder<V>

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

Constructor Summary

Constructors

Constructor and Description
AbstractCovarianceMatrixBuilder()

Method Summary

Methods

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

Description copied from interface: CovarianceMatrixBuilder

Compute Covariance Matrix for a complete database.

Specified by:

processDatabase in interface CovarianceMatrixBuilder<V extends NumberVector<?>>

Parameters:

database - the database used

Returns:

Covariance Matrix

processIds

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

Description copied from interface: CovarianceMatrixBuilder

Compute Covariance Matrix for a collection of database IDs.

Specified by:

processIds in interface CovarianceMatrixBuilder<V extends NumberVector<?>>

Parameters:

ids - a collection of ids

database - the database used

Returns:

Covariance Matrix

processQueryResults

public <D extends NumberDistance<D,?>> Matrix processQueryResults(DistanceDBIDList<D> results,
                                                         Relation<? extends V> 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<V extends NumberVector<?>>

Type Parameters:

D - distance type

Parameters:

results - a collection of QueryResults

database - the database used

k - the number of entries to process

Returns:

Covariance Matrix

processQueryResults

public final <D extends NumberDistance<D,?>> Matrix processQueryResults(DistanceDBIDList<D> results,
                                                         Relation<? extends V> 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<V extends NumberVector<?>>

Type Parameters:

D - distance type

Parameters:

results - a collection of QueryResults

database - the database used

Returns:

Covariance Matrix