smile.data

Class StringAttribute

java.lang.Object

smile.data.Attribute

smile.data.StringAttribute

public class StringAttribute
extends Attribute

String attribute. String attributes may contain arbitrary textual values. Value 0 is reserved for unknown word.

Author:

Haifeng Li

Nested Class Summary

Nested classes/interfaces inherited from class smile.data.Attribute

Attribute.Type

Field Summary

Fields inherited from class smile.data.Attribute

description, name, type, weight

Constructor Summary

Constructors

Constructor and Description
StringAttribute(String name) Constructor.
StringAttribute(String name, double weight) Constructor.
StringAttribute(String name, String description, double weight) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	isOpen() Returns true if the string values of the nominal attribute is a open set.
void	setOpen(boolean open) Sets if the string values of the nominal attribute is a open set.
String	toString(double x) Returns the string representation of a double value of this attribute.
double	valueOf(String s) Returns the double value of a string of this attribute.
List<String>	values() Returns the list of string values of this attribute.

Methods inherited from class smile.data.Attribute

equals, hashCode, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

StringAttribute

public StringAttribute(String name)

Constructor.

Parameters:

name - the name of attribute.

StringAttribute

public StringAttribute(String name,
               double weight)

Constructor.

Parameters:

name - the name of attribute.

StringAttribute

public StringAttribute(String name,
               String description,
               double weight)

Constructor.

Parameters:

name - the name of attribute.

description - the detailed description of attribute.

Method Detail

values

public List<String> values()

Returns the list of string values of this attribute.

Returns:

the list of string values of this attribute

isOpen

public boolean isOpen()

Returns true if the string values of the nominal attribute is a open set. The new string values will be added into the attribute when calling the method valueOf(String).

Returns:

true if the string values of the nominal attribute is a open set.

setOpen

public void setOpen(boolean open)

Sets if the string values of the nominal attribute is a open set.

Parameters:

open - true if the string values of the nominal attribute is a open set.

valueOf

public double valueOf(String s)
               throws ParseException

Description copied from class: Attribute

Returns the double value of a string of this attribute.

Specified by:

valueOf in class Attribute

Parameters:

s - a string value of this attribute.

Throws:

ParseException

toString

public String toString(double x)

Description copied from class: Attribute

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

Specified by:

toString in class 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.