Class DataSet

java.lang.Object

DataSet

public class DataSet
extends java.lang.Object

Implements a class for a data set for machine-learning methods.

Field Summary

Fields

Modifier and Type	Field and Description
protected Attributes	attributes the attributes of this data set
protected Examples	examples the examples of this data set
protected java.lang.String	name the name of this data set
protected java.util.Random	random a random-number generator

Constructor Summary

Constructors

Constructor and Description
DataSet() Default constructor.
DataSet(Attributes attributes) Explicit constructor.
DataSet(java.lang.String[] options) Explicit constructor.

Method Summary

Modifier and Type	Method and Description
void	add(Example example) Adds the specified example to this data set.
Attributes	getAttributes() Gets the attributes of this DataSet object.
Examples	getExamples() Gets the examples of this data set.
boolean	getHasNumericAttributes() Returns true if this data set has numeric attributes; returns false otherwise.
void	load(java.lang.String filename) Loads a data set from the specified file.
static void	main(java.lang.String[] args) A main method for testing.
private void	parse(java.util.Scanner scanner) Parses a data set from the specified scanner, which consists of parsing the data set's header, attributes, and examples.
void	setRandom(java.util.Random random) Sets the random-number generator for this data set.
java.lang.String	toString() Returns a string representation of the data set in a format identical to that of the file format.

Methods inherited from class java.lang.Object

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

Field Detail

name

protected java.lang.String name

the name of this data set

attributes

protected Attributes attributes

the attributes of this data set

examples

protected Examples examples

the examples of this data set

random

protected java.util.Random random

a random-number generator

Constructor Detail

DataSet

public DataSet()

Default constructor.

DataSet

public DataSet(java.lang.String[] options)

Explicit constructor.

Parameters:

options - the options for this data set

DataSet

public DataSet(Attributes attributes)

Explicit constructor.

Parameters:

attributes - the attributes for this data set

Method Detail

add

public void add(Example example)

Adds the specified example to this data set.

Parameters:

example - the example to be added

getAttributes

public Attributes getAttributes()

Gets the attributes of this DataSet object.

Returns:

the attributes of this data set

getExamples

public Examples getExamples()

Gets the examples of this data set.

Returns:

the examples of this data set

getHasNumericAttributes

public boolean getHasNumericAttributes()

Returns true if this data set has numeric attributes; returns false otherwise.

Returns:

true if this data set has numeric attributes

load

public void load(java.lang.String filename)
          throws java.lang.Exception

Loads a data set from the specified file.

Parameters:

filename - the file from which to read

Throws:

java.lang.Exception - if the file is not found or if a parsing exception occurs

parse

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

Parses a data set from the specified scanner, which consists of parsing the data set's header, attributes, and examples.

Parameters:

scanner - a scanner containing the data set's tokens

Throws:

java.lang.Exception - if a parsing exception occurs

setRandom

public void setRandom(java.util.Random random)

Sets the random-number generator for this data set.

Parameters:

random - the random-number generator

toString

public java.lang.String toString()

Returns a string representation of the data set in a format identical to that of the file format.

Overrides:

toString in class java.lang.Object

Returns:

a string containing data set

main

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

A main method for testing.

Parameters:

args - command-line arguments