weka.core.pmml
Class NormContinuous

java.lang.Object
  weka.core.pmml.Expression
      weka.core.pmml.NormContinuous

All Implemented Interfaces:

Serializable

public class NormContinuous
extends Expression

Class encapsulating a NormContinuous Expression.

Version:

$Revision 1.0 $

Author:

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

See Also:

Serialized Form

Constructor Summary

NormContinuous(Element normCont, FieldMetaInfo.Optype opType, ArrayList<Attribute> fieldDefs)

Method Summary

double	getResult(double[] incoming) Get the result of evaluating the expression.
String	getResultCategorical(double[] incoming) Always throws an Exception since the result of NormContinuous must be continuous.
double	getResultInverse(double[] incoming) Compute the inverse of the normalization (i.e.
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

NormContinuous

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

Throws:

Exception

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 normalizing the input field

Throws:

Exception - if there is a problem computing the result

getResultInverse

public double getResultInverse(double[] incoming)

Compute the inverse of the normalization (i.e. map back to a unormalized value).

Parameters:

incoming - the incoming parameter values

Returns:

the unormalized value

getResultCategorical

public String getResultCategorical(double[] incoming)
                            throws Exception

Always throws an Exception since the result of NormContinuous 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