weka.core.pmml

Class NormDiscrete

java.lang.Object

weka.core.pmml.Expression

weka.core.pmml.NormDiscrete

All Implemented Interfaces:

Serializable

public class NormDiscrete
extends Expression

Class encapsulating a NormDiscrete Expression. Creates an indicator for a particular discrete value.

Version:

$Revision 1.0 $

Author:

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

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
NormDiscrete(Element normDisc, FieldMetaInfo.Optype opType, ArrayList<Attribute> fieldDefs) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
double	getResult(double[] incoming) Get the result of evaluating the expression.
String	getResultCategorical(double[] incoming) Always throws an Exception since the result of NormDiscrete must be continuous.
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

NormDiscrete

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

Constructor. Reads the field name and field value for this NormDiscrete Expression.

Parameters:

normDisc - the Element encapsulating this NormDiscrete

opType - the optype for this expression (taken from either the enclosing DefineFunction or DerivedField)

fieldDefs - an ArrayList of Attributes for the fields that this Expression might need to access enclosing DefineFunction or DerivedField)

Throws:

Exception - if there is a problem parsing this Apply Expression

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

Always throws an Exception since the result of NormDiscrete must be continuous.

Specified by:

getResultCategorical in class Expression

Parameters:

incoming - the incoming parameter values

Returns:

the result of evaluating the expression

Throws:

Exception - always

toString

public String toString(String pad)

Overrides:

toString in class Expression