de.lmu.ifi.dbs.elki.datasource.filter
Class SparseFloatVectorRandomProjectionFilter

java.lang.Object
  de.lmu.ifi.dbs.elki.datasource.filter.AbstractConversionFilter<V,V>
      de.lmu.ifi.dbs.elki.datasource.filter.AbstractRandomFeatureSelectionFilter<SparseFloatVector>
          de.lmu.ifi.dbs.elki.datasource.filter.SparseFloatVectorRandomProjectionFilter

All Implemented Interfaces:

ObjectFilter

public class SparseFloatVectorRandomProjectionFilter
extends AbstractRandomFeatureSelectionFilter<SparseFloatVector>

Parser to project the ParsingResult obtained by a suitable base parser onto a randomly selected subset of attributes.

Nested Class Summary

static class

SparseFloatVectorRandomProjectionFilter.Parameterizer Parameterization class.

Field Summary

Fields inherited from class de.lmu.ifi.dbs.elki.datasource.filter.AbstractRandomFeatureSelectionFilter

k, NUMBER_SELECTED_ATTRIBUTES_ID, random, selectedAttributes

Constructor Summary

SparseFloatVectorRandomProjectionFilter(int dim)
Constructor.

Method Summary

protected SimpleTypeInformation<? super SparseFloatVector>	convertedType(SimpleTypeInformation<SparseFloatVector> in) Get the output type from the input type after conversion.
protected SparseFloatVector	filterSingleObject(SparseFloatVector obj) Normalize a single instance.
protected SimpleTypeInformation<? super SparseFloatVector>	getInputTypeRestriction() Get the input type restriction used for negotiating the data query.

Methods inherited from class de.lmu.ifi.dbs.elki.datasource.filter.AbstractRandomFeatureSelectionFilter

prepareStart

Methods inherited from class de.lmu.ifi.dbs.elki.datasource.filter.AbstractConversionFilter

filter, prepareComplete, prepareProcessInstance

Methods inherited from class java.lang.Object

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

Constructor Detail

SparseFloatVectorRandomProjectionFilter

public SparseFloatVectorRandomProjectionFilter(int dim)

Constructor.

Parameters:

dim -

Method Detail

filterSingleObject

protected SparseFloatVector filterSingleObject(SparseFloatVector obj)

Description copied from class: AbstractConversionFilter

Normalize a single instance. You can implement this as UnsupportedOperationException if you override both public "normalize" functions!

Specified by:

filterSingleObject in class AbstractConversionFilter<SparseFloatVector,SparseFloatVector>

Parameters:

obj - Database object to normalize

Returns:

Normalized database object

getInputTypeRestriction

protected SimpleTypeInformation<? super SparseFloatVector> getInputTypeRestriction()

Description copied from class: AbstractConversionFilter

Get the input type restriction used for negotiating the data query.

Specified by:

getInputTypeRestriction in class AbstractConversionFilter<SparseFloatVector,SparseFloatVector>

Returns:

Type restriction

convertedType

protected SimpleTypeInformation<? super SparseFloatVector> convertedType(SimpleTypeInformation<SparseFloatVector> in)

Description copied from class: AbstractConversionFilter

Get the output type from the input type after conversion.

Specified by:

convertedType in class AbstractConversionFilter<SparseFloatVector,SparseFloatVector>

Parameters:

in - input type restriction

Returns:

output type restriction