de.lmu.ifi.dbs.elki.visualization.visualizers.scatterplot.selection

Class DistanceFunctionVisualization

java.lang.Object

de.lmu.ifi.dbs.elki.visualization.visualizers.AbstractVisFactory

de.lmu.ifi.dbs.elki.visualization.visualizers.scatterplot.selection.DistanceFunctionVisualization

All Implemented Interfaces:

ResultProcessor, Parameterizable, VisFactory

public class DistanceFunctionVisualization
extends AbstractVisFactory

Factory for visualizers to generate an SVG-Element containing dots as markers representing the kNN of the selected Database objects. To use this, add a kNN preprocessor index to your database!

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	DistanceFunctionVisualization.Instance<D extends NumberDistance<D,?>> Instance, visualizing a particular set of kNNs

Field Summary

Fields

Modifier and Type	Field and Description
static String	NAME A short name characterizing this Visualizer.

Fields inherited from class de.lmu.ifi.dbs.elki.visualization.visualizers.AbstractVisFactory

thumbmask

Constructor Summary

Constructors

Constructor and Description
DistanceFunctionVisualization() Constructor

Method Summary

Methods

Modifier and Type	Method and Description
static Element	drawCosine(SVGPlot svgp, Projection2D proj, NumberVector<?> mid, double angle) Visualizes Cosine and ArcCosine distance functions
static double	getLPNormP(AbstractMaterializeKNNPreprocessor<?,?,?> kNN) Get the "p" value of an Lp norm.
static boolean	isAngularDistance(AbstractMaterializeKNNPreprocessor<?,?,?> kNN) Test whether the given preprocessor used an angular distance function
Visualization	makeVisualization(VisualizationTask task) Produce a visualization instance for the given task
void	processNewResult(HierarchicalResult baseResult, Result result) Add visualizers for the given result (tree) to the context.

Methods inherited from class de.lmu.ifi.dbs.elki.visualization.visualizers.AbstractVisFactory

allowThumbnails, makeVisualizationOrThumbnail

Methods inherited from class java.lang.Object

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

Field Detail

NAME

public static final String NAME

A short name characterizing this Visualizer.

See Also:

Constant Field Values

Constructor Detail

DistanceFunctionVisualization

public DistanceFunctionVisualization()

Constructor

Method Detail

makeVisualization

public Visualization makeVisualization(VisualizationTask task)

Description copied from interface: VisFactory

Produce a visualization instance for the given task

Specified by:

makeVisualization in interface VisFactory

Specified by:

makeVisualization in class AbstractVisFactory

Parameters:

task - Visualization task

Returns:

Visualization

processNewResult

public void processNewResult(HierarchicalResult baseResult,
                    Result result)

Description copied from interface: VisFactory

Add visualizers for the given result (tree) to the context.

Parameters:

baseResult - Context to work with

result - Result to process

getLPNormP

public static double getLPNormP(AbstractMaterializeKNNPreprocessor<?,?,?> kNN)

Get the "p" value of an Lp norm.

Parameters:

kNN - kNN preprocessor

Returns:

p of LP norm, or NaN

isAngularDistance

public static boolean isAngularDistance(AbstractMaterializeKNNPreprocessor<?,?,?> kNN)

Test whether the given preprocessor used an angular distance function

Parameters:

kNN - kNN preprocessor

Returns:

true when angular

drawCosine

public static Element drawCosine(SVGPlot svgp,
                 Projection2D proj,
                 NumberVector<?> mid,
                 double angle)

Visualizes Cosine and ArcCosine distance functions

Parameters:

svgp - SVG Plot

proj - Visualization projection

mid - mean vector

angle - Opening angle in radians

Returns:

path element