weka.core.pmml

Class Discretize

java.lang.Object

weka.core.pmml.Expression

weka.core.pmml.Discretize

All Implemented Interfaces:

Serializable

public class Discretize
extends Expression

Class encapsulating a Discretize Expression.

Version:

$Revision 1.0 $

Author:

Mark Hall (mhall{[at]}pentaho{[dot]}com)

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
Discretize(Element discretize, FieldMetaInfo.Optype opType, ArrayList<Attribute> fieldDefs) Constructs a Discretize Expression

Method Summary

Methods

Modifier and Type	Method and Description
double	getResult(double[] incoming) Get the result of evaluating the expression.
String	getResultCategorical(double[] incoming) Gets the result of evaluating the expression when the optype is categorical or ordinal as the actual String value.
void	setFieldDefs(ArrayList<Attribute> fieldDefs) Set the field definitions for this Expression to use
String	toString(String pad)

Methods inherited from class weka.core.pmml.Expression

getExpression, getExpression, getFieldDef, getFieldDefIndex, getOptype, getResultContinuous, toString

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Discretize

public Discretize(Element discretize,
          FieldMetaInfo.Optype opType,
          ArrayList<Attribute> fieldDefs)
           throws Exception

Constructs a Discretize Expression

Parameters:

discretize - the Element containing the discretize expression

opType - the optype of this Discretize Expression

fieldDefs - the structure of the incoming fields

Throws:

Exception - if the optype is not categorical/ordinal or if there is a problem parsing this element

Method Detail

setFieldDefs

public void setFieldDefs(ArrayList<Attribute> fieldDefs)
                  throws Exception

Set the field definitions for this Expression to use

Overrides:

setFieldDefs in class Expression

Parameters:

fieldDefs - the field definitions to use

Throws:

Exception - if there is a problem setting the field definitions

getResult

public double getResult(double[] incoming)
                 throws Exception

Get the result of evaluating the expression. In the case of a continuous optype, a real number is returned; in the case of a categorical/ordinal optype, the index of the nominal value is returned as a double.

Specified by:

getResult in class Expression

Parameters:

incoming - the incoming parameter values

Returns:

the result of evaluating the expression

Throws:

Exception - if there is a problem computing the result

getResultCategorical

public String getResultCategorical(double[] incoming)
                            throws Exception

Gets the result of evaluating the expression when the optype is categorical or ordinal as the actual String value.

Specified by:

getResultCategorical in class Expression

Parameters:

incoming - the incoming parameter values

Returns:

the result of evaluating the expression

Throws:

Exception - if the optype is continuous

toString

public String toString(String pad)

Overrides:

toString in class Expression