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

Type Parameters:

V - Vector base type

All Known Implementing Classes:

AbstractCovarianceMatrixBuilder, StandardCovarianceMatrixBuilder, WeightedCovarianceMatrixBuilder

public interface CovarianceMatrixBuilder<V extends NumberVector<? extends V,?>>

Interface for computing covariance matrixes on a data set.

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
<D extends NumberDistance<?,?>> Matrix	processQueryResults(Collection<DistanceResultPair<D>> results, Relation<? extends V> database) Compute Covariance Matrix for a QueryResult Collection By default it will just collect the ids and run processIds
<D extends NumberDistance<?,?>> Matrix	processQueryResults(Collection<DistanceResultPair<D>> results, Relation<? extends V> database, int k) Compute Covariance Matrix for a QueryResult Collection By default it will just collect the ids and run processIds

Method Detail

processDatabase

Matrix processDatabase(Relation<? extends V> database)

Compute Covariance Matrix for a complete database

Parameters:

database - the database used

Returns:

Covariance Matrix

processIds

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

Compute Covariance Matrix for a collection of database IDs

Parameters:

ids - a collection of ids

database - the database used

Returns:

Covariance Matrix

processQueryResults

<D extends NumberDistance<?,?>> Matrix processQueryResults(Collection<DistanceResultPair<D>> results,
                                                           Relation<? extends V> database,
                                                           int k)

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

Parameters:

results - a collection of QueryResults

database - the database used

k - the number of entries to process

Returns:

Covariance Matrix

processQueryResults

<D extends NumberDistance<?,?>> Matrix processQueryResults(Collection<DistanceResultPair<D>> results,
                                                           Relation<? extends V> database)

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

Parameters:

results - a collection of QueryResults

database - the database used

Returns:

Covariance Matrix