cosc575.p1
Class NominalAttribute

java.lang.Object
  cosc575.p1.Attribute
      cosc575.p1.NominalAttribute

public class NominalAttribute
extends Attribute

Stores the attribute information for data sets for machine learning. An attribute has a name, type, and domain. Types can be discrete, numeric, or nominal.

Field Summary

(package private) java.util.ArrayList<java.lang.String>	domain a list of strings for the domain of nominal attributes
(package private) boolean	sorted a Boolean indicating whether the nominal domain is sorted

Fields inherited from class cosc575.p1.Attribute

name

Constructor Summary

NominalAttribute()

NominalAttribute(java.util.Scanner scanner)
Explicit constructor.

NominalAttribute(java.lang.String name)
Explicit constructor.

Method Summary

void	addValue(java.lang.String value) Adds a new nominal domain value to this attribute.
java.util.ArrayList<java.lang.String>	getDomain() Returns the attribute's domain, which an array of values for nominal attributes.
int	getIndex(java.lang.String value) Returns the index of the specified value index for the attribute.
int	getSize() Gets the size of this attribute's domain.
java.lang.String	getValue(int index) Returns the value of this attribute at the specified index.
static void	main(java.lang.String[] args)
private boolean	parse(java.util.Scanner scanner) Processes a nominal attibute declaration.
java.lang.String	toString() Returns a string representation of this attribute.
boolean	validValue(java.lang.String value) Returns whether the value is valid for a nominal attribute

Methods inherited from class cosc575.p1.Attribute

getName, setName

Methods inherited from class java.lang.Object

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

Field Detail

domain

java.util.ArrayList<java.lang.String> domain

a list of strings for the domain of nominal attributes

sorted

boolean sorted

a Boolean indicating whether the nominal domain is sorted

Constructor Detail

NominalAttribute

public NominalAttribute()

NominalAttribute

public NominalAttribute(java.lang.String name)
                 throws java.lang.Exception

Explicit constructor. Creates an empty data set of the specified name.

Parameters:

name - the name of this data set

Throws:

java.lang.Exception

NominalAttribute

public NominalAttribute(java.util.Scanner scanner)
                 throws java.lang.Exception

Explicit constructor. Creates a data set populated with the tokens in the scanner.

Parameters:

scanner - a Scanner containing the data set's tokens

Throws:

java.lang.Exception - if an exception occurs

Method Detail

addValue

public void addValue(java.lang.String value)
              throws java.lang.Exception

Adds a new nominal domain value to this attribute.

Parameters:

value - the attribute's new domain value

Throws:

java.lang.Exception - if an exception occurs

getSize

public int getSize()
            throws java.lang.Exception

Gets the size of this attribute's domain.

Overrides:

getSize in class Attribute

Returns:

an int storing the size of the domain

Throws:

java.lang.Exception

getDomain

public java.util.ArrayList<java.lang.String> getDomain()

Returns the attribute's domain, which an array of values for nominal attributes.

Returns:

the attribute's domain

getValue

public java.lang.String getValue(int index)
                          throws java.lang.Exception

Returns the value of this attribute at the specified index.

Parameters:

index - the attribute value's index

Throws:

java.lang.Exception - if an exception occurs

getIndex

public int getIndex(java.lang.String value)
             throws java.lang.Exception

Returns the index of the specified value index for the attribute.

Parameters:

value - the attribute's value

Throws:

java.lang.Exception - if an exception occurs

parse

private boolean parse(java.util.Scanner scanner)
               throws java.lang.Exception

Processes a nominal attibute declaration.

Parameters:

scanner - a scanner containing the data set's tokens

Throws:

java.lang.Exception - if an exception occurs

toString

public java.lang.String toString()

Returns a string representation of this attribute.

Overrides:

toString in class Attribute

Returns:

a string representation of this attribute

validValue

public boolean validValue(java.lang.String value)
                   throws java.lang.Exception

Returns whether the value is valid for a nominal attribute

Parameters:

value - the value for testing

Returns:

true if the value is valid; false otherwise

Throws:

java.lang.Exception - if an exception occurs

main

public static void main(java.lang.String[] args)