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

Class StandardCovarianceMatrixBuilder

java.lang.Object

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

All Implemented Interfaces:

CovarianceMatrixBuilder

public class StandardCovarianceMatrixBuilder
extends java.lang.Object
implements CovarianceMatrixBuilder

Class for building a "traditional" covariance matrix vai CovarianceMatrix. Reasonable default choice for a CovarianceMatrixBuilder

Since:

0.2

Author:

Erich Schubert

Constructor Summary

Constructors

Constructor and Description
StandardCovarianceMatrixBuilder()

Method Summary

Modifier and Type	Method and Description
double[][]	processIds(DBIDs ids, Relation<? extends NumberVector> database) Compute Covariance Matrix for a collection of database IDs.

Methods inherited from class java.lang.Object

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

Methods inherited from interface de.lmu.ifi.dbs.elki.math.linearalgebra.pca.CovarianceMatrixBuilder

processQueryResults, processQueryResults, processRelation

Constructor Detail

StandardCovarianceMatrixBuilder

public StandardCovarianceMatrixBuilder()

Method Detail

processIds

public double[][] processIds(DBIDs ids,
                             Relation<? extends NumberVector> database)

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