conexp.fx.core.context

Class Contexts

java.lang.Object

conexp.fx.core.context.Contexts

public class Contexts
extends Object

Constructor Summary

Constructors

Constructor and Description
Contexts()

Method Summary

Modifier and Type	Method and Description
static void	extractAttributeSubcontextFamily(File input, File output, int steps)
static void	extractFast(File input, File output, int steps)
static void	extractSubcontext(File input, File output, int objs, int atts)
static <G,M> Map<Set<M>,Set<M>>	pseudoIntents(MatrixContext<G,M> cxt) computes all pseudo-intents of a MatrixContext.
static MatrixContext<Integer,Integer>	randomWithDensity(int objects, int attributes, int density)
static MatrixContext<Integer,Integer>	randomWithProbability(int objects, int attributes, int probability)

Methods inherited from class java.lang.Object

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

Constructor Detail

Contexts

public Contexts()

Method Detail

randomWithDensity

public static final MatrixContext<Integer,Integer> randomWithDensity(int objects,
                                                                     int attributes,
                                                                     int density)

randomWithProbability

public static final MatrixContext<Integer,Integer> randomWithProbability(int objects,
                                                                         int attributes,
                                                                         int probability)

pseudoIntents

public static final <G,M> Map<Set<M>,Set<M>> pseudoIntents(MatrixContext<G,M> cxt)

computes all pseudo-intents of a MatrixContext. This method may be slow, it is only intended for testing purposes. Definition: For a given context (G,M,I) a pseudo-intent is a subset B of the codomain M, such that it is no intent (i.e. B≠B'') and furthermore each strictly smaller pseudo-intent D⊊B has its closure in B (i.e. D''⊆B).

Parameters:

cxt - MatrixContext

Returns:

a Map whose keys are all pseudo-intents and their intents as values

extractFast

public static final void extractFast(File input,
                                     File output,
                                     int steps)
                              throws Exception

Throws:

Exception

extractAttributeSubcontextFamily

public static final void extractAttributeSubcontextFamily(File input,
                                                          File output,
                                                          int steps)
                                                   throws Exception

Throws:

Exception

extractSubcontext

public static final void extractSubcontext(File input,
                                           File output,
                                           int objs,
                                           int atts)
                                    throws Exception

Throws:

Exception