de.lmu.ifi.dbs.elki.datasource.filter.cleaning

Class ReplaceNaNWithRandomFilter

java.lang.Object

de.lmu.ifi.dbs.elki.datasource.filter.AbstractStreamFilter

de.lmu.ifi.dbs.elki.datasource.filter.cleaning.ReplaceNaNWithRandomFilter

All Implemented Interfaces:

BundleStreamSource, ObjectFilter, StreamFilter

@Alias(value="de.lmu.ifi.dbs.elki.datasource.filter.ReplaceNaNWithRandomFilter")
public class ReplaceNaNWithRandomFilter
extends AbstractStreamFilter

A filter to replace all NaN values. Note: currently, only dense vector columns are supported. TODO: add support for sparse vectors.

Since:

0.4.0

Author:

Erich Schubert

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ReplaceNaNWithRandomFilter.Parameterizer Parameterization class.

Nested classes/interfaces inherited from interface de.lmu.ifi.dbs.elki.datasource.bundle.BundleStreamSource

BundleStreamSource.Event

Field Summary

Fields

Modifier and Type	Field and Description
private NumberVector.Factory<?>[]	densecols Columns to check.
private Distribution	dist Distribution to generate replacement values with.
private static Logging	LOG Class logger
private ArrayList<Object>	rows Row cache.

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

source

Constructor Summary

Constructors

Constructor and Description
ReplaceNaNWithRandomFilter(Distribution dist) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
Object	data(int rnum) Access a particular object and representation.
MultipleObjectsBundle	filter(MultipleObjectsBundle objects) Filter a set of object packages.
BundleMeta	getMeta() Get the current meta data.
BundleStreamSource.Event	nextEvent() Get the next event
private void	updateMeta(BundleMeta meta) Process an updated meta record.

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

asMultipleObjectsBundle, assignDBID, hasDBIDs, init

Methods inherited from class java.lang.Object

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

Field Detail

LOG

private static final Logging LOG

Class logger

densecols

private NumberVector.Factory<?>[] densecols

Columns to check.

dist

private Distribution dist

Distribution to generate replacement values with.

rows

private ArrayList<Object> rows

Row cache.

Constructor Detail

ReplaceNaNWithRandomFilter

public ReplaceNaNWithRandomFilter(Distribution dist)

Constructor.

Method Detail

getMeta

public BundleMeta getMeta()

Description copied from interface: BundleStreamSource

Get the current meta data.

Returns:

Metadata

data

public Object data(int rnum)

Description copied from interface: BundleStreamSource

Access a particular object and representation.

Parameters:

rnum - Representation number

Returns:

Contained data

nextEvent

public BundleStreamSource.Event nextEvent()

Description copied from interface: BundleStreamSource

Get the next event

Returns:

Event type

updateMeta

private void updateMeta(BundleMeta meta)

Process an updated meta record.

Parameters:

meta - Meta record

filter

public MultipleObjectsBundle filter(MultipleObjectsBundle objects)

Description copied from interface: ObjectFilter

Filter a set of object packages.

Specified by:

filter in interface ObjectFilter

Overrides:

filter in class AbstractStreamFilter

Parameters:

objects - Object to filter

Returns:

Filtered objects