de.lmu.ifi.dbs.elki.math.linearalgebra.pca
Class StandardCovarianceMatrixBuilder<V extends NumberVector<? extends V,?>>

java.lang.Object
  de.lmu.ifi.dbs.elki.math.linearalgebra.pca.AbstractCovarianceMatrixBuilder<V>
      de.lmu.ifi.dbs.elki.math.linearalgebra.pca.StandardCovarianceMatrixBuilder<V>

Type Parameters:

V - Vector class to use.

All Implemented Interfaces:

CovarianceMatrixBuilder<V>, InspectionUtilFrequentlyScanned, Parameterizable

public class StandardCovarianceMatrixBuilder<V extends NumberVector<? extends V,?>>
extends AbstractCovarianceMatrixBuilder<V>

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

Constructor Summary

StandardCovarianceMatrixBuilder()

Method Summary

Matrix	processDatabase(Relation<? extends V> database) Compute Covariance Matrix for a complete database
Matrix	processIds(DBIDs ids, Relation<? extends V> database) Compute Covariance Matrix for a collection of database IDs

Methods inherited from class de.lmu.ifi.dbs.elki.math.linearalgebra.pca.AbstractCovarianceMatrixBuilder

processQueryResults, processQueryResults

Methods inherited from class java.lang.Object

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

Constructor Detail

StandardCovarianceMatrixBuilder

public StandardCovarianceMatrixBuilder()

Method Detail

processDatabase

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

Compute Covariance Matrix for a complete database

Specified by:

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

Overrides:

processDatabase in class AbstractCovarianceMatrixBuilder<V extends NumberVector<? extends V,?>>

Parameters:

database - the database used

Returns:

Covariance Matrix

processIds

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

Compute Covariance Matrix for a collection of database IDs

Specified by:

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

Specified by:

processIds in class AbstractCovarianceMatrixBuilder<V extends NumberVector<? extends V,?>>

Parameters:

ids - a collection of ids

database - the database used

Returns:

Covariance Matrix