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kddml.Operators.Preprocessing.PP_NUMERIC_DISCRETIZATION_RESOLVER Class Reference

Inheritance diagram for kddml.Operators.Preprocessing.PP_NUMERIC_DISCRETIZATION_RESOLVER:

kddml.Operators.Preprocessing.PPAlgorithmLoaderResolver kddml.Operators.AlgorithmLoaderResolver kddml.Operators.OperatorResolver kddml.Operators.HWResourcesDescription List of all members.

Public Member Functions

void readAttributes (Hashtable< String, KDDMLScalarManager > parameters) throws KDDMLCoreException
KDDMLObject execute (Hashtable< String, KDDMLScalarManager > settings, Vector< KDDMLObject > arguments) throws ResolverException, KDDMLCoreException
kddml.Core.KDDMLObjectType getArgumentType (int i)
int estimatedRAMUsage ()

Protected Member Functions

String getHistoryDescription ()

Detailed Description

Discretization techniques can be used to reduce the number of values for a given continuous attribute, by dividing the range of the attribute into intervals. The operator takes a preprocessing table, a numeric attribute and a discretization method and returns a new preprocessing table with discretized values for the specified attribute. There are many methods for data discretization, each of them expressed by using the XML element ALGORITHM.

Title: KDDML

Description: Knowledge Discovery in Database Environment

Copyright: Copyright (c) 2003-2005

Company: Universita' di Pisa - Dipartimento di Informatica

Author:
Andrea Romei (romei@di.unipi.it)

Sandra Zimei

Version:
2.0.16


Member Function Documentation

void kddml.Operators.Preprocessing.PP_NUMERIC_DISCRETIZATION_RESOLVER.readAttributes Hashtable< String, KDDMLScalarManager parameters  )  throws KDDMLCoreException
 

Reads the XML attributes related to a generic preprocessing operator. An operator settings object captures the attributes associated with a particular operator. It allows a knowledgeable user to fine tune operator parameters. Generally, not all parameters must be specified, however, those specified are taken into account by the KDDML.
Attributes are given as hashtable, where the key is the name of the attribute related to the operator and the value is a KDDMLScalar object containing the attribute value. Attribute value is checked by the interpreter layer and its type is correct.

Parameters:
parameters Hashtable the attributes related to the operator. The key of the hashtable is the name of the operator. The value of the hashtable is a KDDMLScalar representing the value of the operator.
Exceptions:
ResolverException if a resolving error occurs.
KDDMLCoreException if a level core error occurs.

KDDMLObject kddml.Operators.Preprocessing.PP_NUMERIC_DISCRETIZATION_RESOLVER.execute Hashtable< String, KDDMLScalarManager settings,
Vector< KDDMLObject arguments
throws ResolverException, KDDMLCoreException [virtual]
 

Overloading of the main execute method. Returns the result of evaluating the operator over the passed arguments and attributes.
Attributes are given as hashtable, where the key is the name of the XML attribute related to the operator and the value is a KDDMLScalar object containing the attribute value. Attribute value is checked by the interpreter layer and it is correct.
Arguments are given as vector of KDDMLOjbect. Types of arguments are correct, as required by the getArgumentType(int i) method.
Implementations of the execute method can be distinguished according to the type of operator.

Parameters:
settings Hashtable the attributes related to the operator. The key of the hashtable is the name of the attribute. The value of the hashtable is a KDDMLScalar representing the value of the attribute.
arguments Vector the list of arguments as KDDMLObject.
Returns:
KDDMLObject the result of evaluating the operator.
Exceptions:
ResolverException if a resolving error occurs.
KDDMLCoreException if a level core error occurs.

Implements kddml.Operators.OperatorResolver.

kddml.Core.KDDMLObjectType kddml.Operators.Preprocessing.PP_NUMERIC_DISCRETIZATION_RESOLVER.getArgumentType int  i  )  [virtual]
 

Returns the expected type of the i-th argument of the operator. Returns null if the operator do not admit argument as i-th child.

Parameters:
i int
Returns:
KDDMLObjectType

Implements kddml.Operators.OperatorResolver.

int kddml.Operators.Preprocessing.PP_NUMERIC_DISCRETIZATION_RESOLVER.estimatedRAMUsage  ) 
 

Returns the estimated RAM usage for the operator. Must be a value between 0 and 1024 MB.

Returns:
int default returns 256.

Reimplemented from kddml.Operators.OperatorResolver.

String kddml.Operators.Preprocessing.PP_NUMERIC_DISCRETIZATION_RESOLVER.getHistoryDescription  )  [protected]
 

Returns a description of the actions performed by this preprocessing operator. This description will be reported in the history related to the preprocessing data source.

Returns:
String
Exceptions:
KDDMLCoreException 


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