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

Field Summary

Fields

Modifier and Type	Field and Description
protected String	m_displayName display name
protected Expression	m_expression the single expression that defines the value of this field
protected ArrayList<FieldMetaInfo.Value>	m_values the list of values (if the field is ordinal) - may be of size zero if none are specified.

Fields inherited from class weka.core.pmml.FieldMetaInfo

m_fieldName, m_optype

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method and Description
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
String	toString()

Methods inherited from class weka.core.pmml.FieldMetaInfo

getFieldName, getOptype

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

m_displayName

protected String m_displayName

display name

m_values

protected ArrayList<FieldMetaInfo.Value> m_values

the list of values (if the field is ordinal) - may be of size zero if none are specified. If none are specified, we may be able to construct this by querying the Expression in this derived field

m_expression

protected Expression m_expression

the single expression that defines the value of this field

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 -

Throws:

Exception

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