de.lmu.ifi.dbs.elki.parser.meta
Class RandomProjectionParser<V extends RealVector<V,?>>

java.lang.Object
  de.lmu.ifi.dbs.elki.logging.AbstractLoggable
      de.lmu.ifi.dbs.elki.utilities.optionhandling.AbstractParameterizable
          de.lmu.ifi.dbs.elki.parser.meta.MetaParser<V>
              de.lmu.ifi.dbs.elki.parser.meta.RandomProjectionParser<V>

Type Parameters:

V - the type of RealVector contained in both the ParsingResult of the base parser and the projected ParsingResult of this ProjectionParser

All Implemented Interfaces:

Parser<V>, Parameterizable

Direct Known Subclasses:

DoubleVectorRandomProjectionParser, SparseFloatVectorRandomProjectionParser

public abstract class RandomProjectionParser<V extends RealVector<V,?>>
extends MetaParser<V>

A RandomProjectionParser selects a subset of attributes randomly for projection of a ParsingResult.

The cardinality of the subset of attributes is specified as a parameter.

Author:

Arthur Zimek

Field Summary

protected int	k Holds the desired cardinality of the subset of attributes selected for projection.
static OptionID	NUMBER_SELECTED_ATTRIBUTES_ID ID for the parameter NUMBER_SELECTED_ATTRIBUTES_PARAM.
private IntParameter	NUMBER_SELECTED_ATTRIBUTES_PARAM Parameter for the desired cardinality of the subset of attributes selected for projection.
protected Random	random Holds a random object.

Fields inherited from class de.lmu.ifi.dbs.elki.parser.meta.MetaParser

BASEPARSER_ID

Fields inherited from class de.lmu.ifi.dbs.elki.utilities.optionhandling.AbstractParameterizable

optionHandler

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

debug, logger

Constructor Summary

protected

RandomProjectionParser() Adds the parameter NUMBER_SELECTED_ATTRIBUTES_PARAM.

Method Summary

List<String>

setParameters(List<String> args) Calls the super method and sets additionally the value of the parameter NUMBER_SELECTED_ATTRIBUTES_PARAM.

Methods inherited from class de.lmu.ifi.dbs.elki.parser.meta.MetaParser

retrieveBaseParsingresult, toString

Methods inherited from class de.lmu.ifi.dbs.elki.utilities.optionhandling.AbstractParameterizable

addOption, addParameterizable, addParameterizable, checkGlobalParameterConstraints, collectOptions, getAttributeSettings, getParameters, rememberParametersExcept, removeOption, removeParameterizable, shortDescription

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

Methods inherited from interface de.lmu.ifi.dbs.elki.parser.Parser

parse

Methods inherited from interface de.lmu.ifi.dbs.elki.utilities.optionhandling.Parameterizable

checkGlobalParameterConstraints, collectOptions, getParameters, shortDescription

Field Detail

k

protected int k

Holds the desired cardinality of the subset of attributes selected for projection.

NUMBER_SELECTED_ATTRIBUTES_ID

public static final OptionID NUMBER_SELECTED_ATTRIBUTES_ID

ID for the parameter NUMBER_SELECTED_ATTRIBUTES_PARAM.

NUMBER_SELECTED_ATTRIBUTES_PARAM

private final IntParameter NUMBER_SELECTED_ATTRIBUTES_PARAM

Parameter for the desired cardinality of the subset of attributes selected for projection.

Key: -randomprojection.numberselected

Default: 1

Constraint: ≥1

random

protected final Random random

Holds a random object.

Constructor Detail

RandomProjectionParser

protected RandomProjectionParser()

Adds the parameter NUMBER_SELECTED_ATTRIBUTES_PARAM.

Method Detail

setParameters

public List<String> setParameters(List<String> args)
                           throws ParameterException

Calls the super method and sets additionally the value of the parameter NUMBER_SELECTED_ATTRIBUTES_PARAM.

Specified by:

setParameters in interface Parameterizable

Overrides:

setParameters in class MetaParser<V extends RealVector<V,?>>

Parameters:

args - parameters to set the attributes accordingly to

Returns:

a list containing the unused parameters

Throws:

ParameterException - in case of wrong parameter-setting

See Also:

AbstractParameterizable.setParameters(java.util.List)