de.lmu.ifi.dbs.elki.parser
Class NumberVectorLabelParser<V extends NumberVector<?,?>>

java.lang.Object
  de.lmu.ifi.dbs.elki.logging.AbstractLoggable
      de.lmu.ifi.dbs.elki.parser.AbstractParser<V>
          de.lmu.ifi.dbs.elki.parser.NumberVectorLabelParser<V>

Type Parameters:

V - the type of NumberVector expected in the ParsingResult

All Implemented Interfaces:

LinebasedParser<V>, Parser<V>, Parameterizable

Direct Known Subclasses:

DoubleVectorLabelParser, FloatVectorLabelParser, SparseFloatVectorLabelParser

public abstract class NumberVectorLabelParser<V extends NumberVector<?,?>>
extends AbstractParser<V>
implements LinebasedParser<V>, Parameterizable

Provides a parser for parsing one point per line, attributes separated by whitespace.

Several labels may be given per point. A label must not be parseable as double. Lines starting with "#" will be ignored.

An index can be specified to identify an entry to be treated as class label. This index counts all entries (numeric and labels as well) starting with 0.

Author:

Arthur Zimek

Field Summary

private static OptionID	LABEL_INDICES_ID OptionID for LABEL_INDICES_PARAM
private IntListParameter	LABEL_INDICES_PARAM A comma separated list of the indices of labels (may be numeric), counting whitespace separated entries in a line starting with 0.
protected BitSet	labelIndices Keeps the indices of the attributes to be treated as a string label.

Fields inherited from class de.lmu.ifi.dbs.elki.parser.AbstractParser

ATTRIBUTE_CONCATENATION, COMMENT, WHITESPACE_PATTERN

Fields inherited from class de.lmu.ifi.dbs.elki.logging.AbstractLoggable

debug, logger

Constructor Summary

NumberVectorLabelParser(Parameterization config)
Constructor, adhering to Parameterizable

Method Summary

protected abstract V	createDBObject(List<Double> attributes) Creates a database object of type V.
ParsingResult<V>	parse(InputStream in) Returns a list of the objects parsed from the specified input stream and a list of the labels associated with the objects.
Pair<V,List<String>>	parseLine(String line) Parse a single line into a database object

Methods inherited from class de.lmu.ifi.dbs.elki.parser.AbstractParser

toString

Methods inherited from class de.lmu.ifi.dbs.elki.logging.AbstractLoggable

debugFine, debugFiner, debugFinest, exception, progress, verbose, warning

Methods inherited from class java.lang.Object

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

Field Detail

LABEL_INDICES_ID

private static final OptionID LABEL_INDICES_ID

OptionID for LABEL_INDICES_PARAM

LABEL_INDICES_PARAM

private final IntListParameter LABEL_INDICES_PARAM

A comma separated list of the indices of labels (may be numeric), counting whitespace separated entries in a line starting with 0. The corresponding entries will be treated as a label.

Key: -parser.labelIndices

labelIndices

protected BitSet labelIndices

Keeps the indices of the attributes to be treated as a string label.

Constructor Detail

NumberVectorLabelParser

public NumberVectorLabelParser(Parameterization config)

Constructor, adhering to Parameterizable

Parameters:

config - Parameterization

Method Detail

parse

public ParsingResult<V> parse(InputStream in)

Description copied from interface: Parser

Returns a list of the objects parsed from the specified input stream and a list of the labels associated with the objects.

Specified by:

parse in interface Parser<V extends NumberVector<?,?>>

Parameters:

in - the stream to parse objects from

Returns:

a list containing those objects parsed from the input stream and their associated labels.

parseLine

public Pair<V,List<String>> parseLine(String line)

Description copied from interface: LinebasedParser

Parse a single line into a database object

Specified by:

parseLine in interface LinebasedParser<V extends NumberVector<?,?>>

Parameters:

line - single line

Returns:

parsing result

createDBObject

protected abstract V createDBObject(List<Double> attributes)

Creates a database object of type V.

Parameters:

attributes - the attributes of the vector to create.

Returns:

a RalVector of type V containing the given attribute values