org.knime.base.node.mine.mds.distances
Class CosinusDistanceManager

java.lang.Object
  org.knime.base.node.mine.mds.distances.CosinusDistanceManager

All Implemented Interfaces:

DistanceManager

public class CosinusDistanceManager
extends Object
implements DistanceManager

Author:

Kilian Thiel, University of Konstanz

Constructor Summary

CosinusDistanceManager(double offset, boolean fuzzy)
Creates new instance of CosinusDistanceManager with given offset and fuzzy flag.

Method Summary

double	getDistance(DataPoint point1, DataPoint point2) Returns the distance between the given DataPoints, point1 and point2.
double	getDistance(DataRow row1, DataRow row2) Returns the distance between the given DataRows, row1 and row2.
String	getType()

Methods inherited from class java.lang.Object

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

Constructor Detail

CosinusDistanceManager

public CosinusDistanceManager(double offset,
                              boolean fuzzy)

Creates new instance of CosinusDistanceManager with given offset and fuzzy flag. If fuzzy is set true, only fuzzy columns are considered to compute distance, if false only number columns.

Parameters:

offset - offset to use for distance calculation

fuzzy - if true only fuzzy data is respected, if false only number data

Method Detail

getDistance

public double getDistance(DataRow row1,
                          DataRow row2)

Returns the distance between the given DataRows, row1 and row2. The distance metric is up to the concrete implementation.

Specified by:

getDistance in interface DistanceManager

Parameters:

row1 - First DataRow to compute distance.

row2 - Second DataRow to compute distance.

Returns:

The distance between given DataRows.

getDistance

public double getDistance(DataPoint point1,
                          DataPoint point2)

Returns the distance between the given DataPoints, point1 and point2. The distance metric is up to the concrete implementation.

Specified by:

getDistance in interface DistanceManager

Parameters:

point1 - First DataPoint to compute distance.

point2 - Second DataPoint to compute distance.

Returns:

The distance between given DataRows.

getType

public String getType()

Specified by:

getType in interface DistanceManager

Returns:

The type of the DistanceManager. See DistanceManagerFactory for valid types.

See Also:

#COS_DIST, #EUCLIDEAN_DIST, #MANHATTAN_DIST