cosc575.p1
Class Attributes

java.lang.Object
  cosc575.p1.Attributes

public class Attributes
extends java.lang.Object

Stores the attributes information for data sets for machine learning.

Field Summary

private java.util.ArrayList<Attribute>	attributes a list of attribute names
private int	classIndex stores the position of the class label
(package private) boolean	hasDiscreteAttributes a flag indicating that the data set has one or more discrete attributes
(package private) boolean	hasNominalAttributes a flag indicating that the data set has one or more nominal attributes
(package private) boolean	hasNumericAttributes a flag indicating that the data set has one or more numeric attributes

Constructor Summary

Attributes()
Default constructor.

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

Method Summary

void	add(Attribute attribute) Adds a new attribute to this set of attributes.
Attribute	get(int i) Returns the ith attribute in this set of attributes.
Attribute	getClassAttribute() Returns the class attribute.
int	getClassIndex() Returns the index of the class label.
boolean	getHasDiscreteAttributes() Returns true if this set of attributes has one or more discrete attributes; returns false otherwise.
boolean	getHasNominalAttributes() Returns true if this set of attributes has one or more nominal attributes; returns false otherwise.
boolean	getHasNumericAttributes() Returns true if this set of attributes has one or more numeric attributes; returns false otherwise.
int	getIndex(java.lang.String name) Returns the attribute's index.
int	getSize() Returns the number of attributes.
private void	initialize() Initializes the names, types, and domains lists.
static void	main(java.lang.String[] args)
private void	parse(java.util.Scanner scanner) Parses the attribute declarations in the specified scanner.
void	setClassIndex(int classIndex) Sets the class index for this set of attributes.
java.lang.String	toString() Returns a string representation of the names structure.

Methods inherited from class java.lang.Object

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

Field Detail

attributes

private java.util.ArrayList<Attribute> attributes

a list of attribute names

hasNumericAttributes

boolean hasNumericAttributes

a flag indicating that the data set has one or more numeric attributes

hasNominalAttributes

boolean hasNominalAttributes

a flag indicating that the data set has one or more nominal attributes

hasDiscreteAttributes

boolean hasDiscreteAttributes

a flag indicating that the data set has one or more discrete attributes

classIndex

private int classIndex

stores the position of the class label

Constructor Detail

Attributes

Attributes()

Default constructor.

Attributes

Attributes(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

initialize

private void initialize()

Initializes the names, types, and domains lists.

getClassIndex

public int getClassIndex()

Returns the index of the class label.

Returns:

the index of the class label

setClassIndex

public void setClassIndex(int classIndex)
                   throws java.lang.Exception

Sets the class index for this set of attributes.

Parameters:

classIndex - the new class index

Throws:

java.lang.Exception - if an exception occurs

getHasNumericAttributes

public boolean getHasNumericAttributes()

Returns true if this set of attributes has one or more numeric attributes; returns false otherwise.

Returns:

true if this set of attributes has numeric attributes

getHasDiscreteAttributes

public boolean getHasDiscreteAttributes()

Returns true if this set of attributes has one or more discrete attributes; returns false otherwise.

Returns:

true if this set of attributes has discrete attributes

getHasNominalAttributes

public boolean getHasNominalAttributes()

Returns true if this set of attributes has one or more nominal attributes; returns false otherwise.

Returns:

true if this set of attributes has nominal attributes

get

public Attribute get(int i)
              throws java.lang.Exception

Returns the ith attribute in this set of attributes.

Parameters:

i - the index of the specified attribute

Returns:

the ith Attribute

Throws:

java.lang.Exception - if an exception occurs

getClassAttribute

public Attribute getClassAttribute()
                            throws java.lang.Exception

Returns the class attribute.

Returns:

the class attribute

Throws:

java.lang.Exception - if an exception occurs

getSize

public int getSize()

Returns the number of attributes.

Returns:

the number of attributes

getIndex

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

Returns the attribute's index.

Parameters:

name - the attribute's name

Returns:

the attribute's position in the names array

Throws:

java.lang.Exception - if an exception occurs

add

public void add(Attribute attribute)
         throws java.lang.Exception

Adds a new attribute to this set of attributes.

Parameters:

attribute - the attribute's name

Throws:

java.lang.Exception - if an exception occurs

parse

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

Parses the attribute declarations in the specified scanner.

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 the names structure.

Overrides:

toString in class java.lang.Object

Returns:

a string representation of the names structure

main

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