weka.core.pmml
Class DerivedFieldMetaInfo

java.lang.Object
  weka.core.pmml.FieldMetaInfo
      weka.core.pmml.DerivedFieldMetaInfo

All Implemented Interfaces:

Serializable

public class DerivedFieldMetaInfo
extends FieldMetaInfo
implements Serializable

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class weka.core.pmml.FieldMetaInfo

FieldMetaInfo.Interval, FieldMetaInfo.Optype, FieldMetaInfo.Value

Constructor Summary

DerivedFieldMetaInfo(Element derivedField, ArrayList<Attribute> fieldDefs, weka.core.pmml.TransformationDictionary transDict)

Method Summary

double	getDerivedValue(double[] incoming) Get the derived field value for the given incoming vector of values.
Attribute	getFieldAsAttribute() Get this derived field as an Attribute.
void	setFieldDefs(ArrayList<Attribute> fieldDefs) Upadate the field definitions for this derived field
void	setFieldDefs(Instances fields) Upadate the field definitions for this derived field
String	toString()

Methods inherited from class weka.core.pmml.FieldMetaInfo

getFieldName, getOptype

Methods inherited from class java.lang.Object

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

Constructor Detail

DerivedFieldMetaInfo

public DerivedFieldMetaInfo(Element derivedField,
                            ArrayList<Attribute> fieldDefs,
                            weka.core.pmml.TransformationDictionary transDict)
                     throws Exception

Throws:

Exception

Method Detail

setFieldDefs

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

Upadate the field definitions for this derived field

Parameters:

fieldDefs - the fields as an ArrayList of Attributes

Throws:

Exception - if there is a problem setting the field definitions

setFieldDefs

public void setFieldDefs(Instances fields)
                  throws Exception

Upadate the field definitions for this derived field

Parameters:

fields - the fields as an Instances object

Throws:

Exception - if there is a problem setting the field definitions

getFieldAsAttribute

public Attribute getFieldAsAttribute()

Get this derived field as an Attribute.

Specified by:

getFieldAsAttribute in class FieldMetaInfo

Returns:

an Attribute for this derived field.

getDerivedValue

public double getDerivedValue(double[] incoming)
                       throws Exception

Get the derived field value for the given incoming vector of values. Incoming values are assumed to be in the same order as the attributes supplied in the field definitions ArrayList used to construct this DerivedField. If the optype of this derived field is continuous, then a real number is returned. Otherwise, the number returned is the index of the categorical/ordinal value corresponding to result of computing the derived field value.

Parameters:

incoming - the incoming parameter values

Returns:

the result of computing the derived value

Throws:

Exception - if there is a problem computing the value

toString

public String toString()

Overrides:

toString in class Object