Package smile.data

Class Attribute

java.lang.Object

smile.data.Attribute

All Implemented Interfaces:

java.io.Serializable

Direct Known Subclasses:

DateAttribute, NominalAttribute, NumericAttribute

public abstract class Attribute
extends java.lang.Object
implements java.io.Serializable

Generic class to represent a named attribute/variable.

Author:

Haifeng Li

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	Attribute.Type	The type of attributes.

Constructor Summary

Constructors

Constructor	Description
Attribute(Attribute.Type type, java.lang.String name)	Constructor.
Attribute(Attribute.Type type, java.lang.String name, double weight)	Constructor.
Attribute(Attribute.Type type, java.lang.String name, java.lang.String description)	Constructor.
Attribute(Attribute.Type type, java.lang.String name, java.lang.String description, double weight)	Constructor.

Method Summary

Modifier and Type	Method	Description
boolean	equals(java.lang.Object o)
java.lang.String	getDescription()
java.lang.String	getName()
Attribute.Type	getType()
double	getWeight()
int	hashCode()
Attribute	setDescription(java.lang.String description)
Attribute	setName(java.lang.String name)
Attribute	setWeight(double weight)
java.lang.String	toString()
abstract java.lang.String	toString(double x)	Returns the string representation of a double value of this attribute.
abstract double	valueOf(java.lang.String s)	Returns the double value of a string of this attribute.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

Attribute

public Attribute(Attribute.Type type,
                 java.lang.String name)

Constructor.

Attribute

public Attribute(Attribute.Type type,
                 java.lang.String name,
                 double weight)

Constructor.

Attribute

public Attribute(Attribute.Type type,
                 java.lang.String name,
                 java.lang.String description)

Constructor.

Attribute

public Attribute(Attribute.Type type,
                 java.lang.String name,
                 java.lang.String description,
                 double weight)

Constructor.

Method Detail

getType

public Attribute.Type getType()

getName

public java.lang.String getName()

setName

public Attribute setName(java.lang.String name)

getDescription

public java.lang.String getDescription()

setDescription

public Attribute setDescription(java.lang.String description)

getWeight

public double getWeight()

setWeight

public Attribute setWeight(double weight)

toString

public abstract java.lang.String toString(double x)

Returns the string representation of a double value of this attribute.

Parameters:

x - a double value of this attribute. NaN means missing value.

Returns:

the string representation of x. For nominal, date and string attributes, null will be returned for missing values. For numeric attributes, "NaN" will be returned for missing values.

valueOf

public abstract double valueOf(java.lang.String s)
                        throws java.text.ParseException

Returns the double value of a string of this attribute.

Parameters:

s - a string value of this attribute.

Throws:

java.text.ParseException

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object