Package elki.datasource.parser

Class ClusteringVectorParser

java.lang.Object

elki.datasource.parser.AbstractStreamingParser

elki.datasource.parser.ClusteringVectorParser

All Implemented Interfaces:

BundleStreamSource, Parser, StreamingParser

public class ClusteringVectorParser
extends AbstractStreamingParser

Parser for simple clustering results in vector form, as written by ClusteringVectorDumper.

This allows reading the output of multiple clustering runs, and analyze the results using ELKI algorithm.

The input format is very simple, each line containing a sequence of cluster assignments in integer form, and an optional label:

 0 0 1 1 0 First
 0 0 0 1 2 Second
 

represents two clusterings for 5 objects. The first clustering has two clusters, the second contains three clusters.

TODO: this parser currently is quite hacky, and could use a cleanup.

TODO: support noise, via negative cluster numbers?

Since:

0.7.0

Author:

Erich Schubert

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ClusteringVectorParser.Par	Parameterization class.

Nested classes/interfaces inherited from interface elki.datasource.bundle.BundleStreamSource

BundleStreamSource.Event

Field Summary

Fields

Modifier and Type	Field	Description
(package private) it.unimi.dsi.fastutil.ints.IntArrayList	buf1	Buffers, will be reused.
(package private) Clustering<Model>	curclu	Current clustering.
(package private) LabelList	curlbl	Current labels.
(package private) boolean	haslbl	Flag if labels are present.
(package private) java.util.ArrayList<java.lang.String>	lbl	Buffer for labels.
private static Logging	LOG	Class logger.
protected BundleMeta	meta	Metadata.
(package private) BundleStreamSource.Event	nextevent	Event to report next.
(package private) int	numterms	Number of different terms observed.
(package private) DBIDRange	range	Range of the DBID values.

Fields inherited from class elki.datasource.parser.AbstractStreamingParser

reader, tokenizer

Constructor Summary

Constructors

Constructor	Description
ClusteringVectorParser(CSVReaderFormat format)	Constructor.

Method Summary

Modifier and Type	Method	Description
java.lang.Object	data(int rnum)	Access a particular object and representation.
protected Logging	getLogger()	Get the logger for this class.
BundleMeta	getMeta()	Get the current meta data.
void	initStream(java.io.InputStream in)	Init the streaming parser for the given input stream.
BundleStreamSource.Event	nextEvent()	Get the next event

Methods inherited from class elki.datasource.parser.AbstractStreamingParser

asMultipleObjectsBundle, assignDBID, cleanup, hasDBIDs, parse

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.

numterms

int numterms

Number of different terms observed.

meta

protected BundleMeta meta

Metadata.

nextevent

BundleStreamSource.Event nextevent

Event to report next.

curclu

Clustering<Model> curclu

Current clustering.

curlbl

LabelList curlbl

Current labels.

buf1

it.unimi.dsi.fastutil.ints.IntArrayList buf1

Buffers, will be reused.

range

DBIDRange range

Range of the DBID values.

lbl

java.util.ArrayList<java.lang.String> lbl

Buffer for labels.

haslbl

boolean haslbl

Flag if labels are present.

Constructor Detail

ClusteringVectorParser

public ClusteringVectorParser(CSVReaderFormat format)

Constructor.

Parameters:

format - Input format

Method Detail

initStream

public void initStream(java.io.InputStream in)

Description copied from interface: StreamingParser

Init the streaming parser for the given input stream.

Specified by:

initStream in interface StreamingParser

Overrides:

initStream in class AbstractStreamingParser

Parameters:

in - the stream to parse objects from

nextEvent

public BundleStreamSource.Event nextEvent()

Description copied from interface: BundleStreamSource

Get the next event

Returns:

Event type

data

public java.lang.Object data(int rnum)

Description copied from interface: BundleStreamSource

Access a particular object and representation.

Parameters:

rnum - Representation number

Returns:

Contained data

getMeta

public BundleMeta getMeta()

Description copied from interface: BundleStreamSource

Get the current meta data.

Returns:

Metadata

getLogger

protected Logging getLogger()

Description copied from class: AbstractStreamingParser

Get the logger for this class.

Specified by:

getLogger in class AbstractStreamingParser

Returns:

Logger.