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Java Source Code / Java Documentation » Science » weka » weka.core

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Java Document (Java Doc)

java.lang .Object

weka.core .TestInstances

TestInstances

public class TestInstances implements Cloneable,Serializable,OptionHandler(Code)

Generates artificial datasets for testing. In case of Multi-Instance data the settings for the number of attributes applies to the data inside the bag. Originally based on code from the CheckClassifier.

Valid options are:

 -relation <name>
 The name of the data set.

 -seed <num>
 The seed value.

 -num-instances <num>
 The number of instances in the datasets (default 20).

 -class-type <num>
 The class type, see constants in weka.core.Attribute
 (default 1=nominal).

 -class-values <num>
 The number of classes to generate (for nominal classes only)
 (default 2).

 -class-index <num>
 The class index, with -1=last, (default -1).

 -no-class
 Doesn't include a class attribute in the output.

 -nominal <num>
 The number of nominal attributes (default 1).

 -nominal-values <num>
 The number of values for nominal attributes (default 2).

 -numeric <num>
 The number of numeric attributes (default 0).

 -string <num>
 The number of string attributes (default 0).

 -words <comma-separated-list>
 The words to use in string attributes.

 -word-separators <chars>
 The word separators to use in string attributes.

 -date <num>
 The number of date attributes (default 0).

 -relational <num>
 The number of relational attributes (default 0).

 -relational-nominal <num>
 The number of nominal attributes in a rel. attribute (default 1).

 -relational-nominal-values <num>
 The number of values for nominal attributes in a rel. attribute (default 2).

 -relational-numeric <num>
 The number of numeric attributes in a rel. attribute (default 0).

 -relational-string <num>
 The number of string attributes in a rel. attribute (default 0).

 -relational-date <num>
 The number of date attributes in a rel. attribute (default 0).

 -num-instances-relational <num>
 The number of instances in relational/bag attributes (default 10).

 -multi-instance
 Generates multi-instance data.

 -W <classname>
 The Capabilities handler to base the dataset on.
 The other parameters can be used to override the ones
 determined from the handler. Additional parameters for
 handler can be passed on after the '--'.

author:
   FracPete (fracpete at waikato dot ac dot nz)
version:
   $Revision: 1.9 $
See Also:   weka.classifiers.CheckClassifier

Field Summary
final public static int	CLASS_IS_LAST
final public static String	DEFAULT_SEPARATORS
final public static String[]	DEFAULT_WORDS
final public static int	NO_CLASS
protected int	m_ClassIndex
protected int	m_ClassType
protected Instances	m_Data
protected CapabilitiesHandler	m_Handler
protected boolean	m_MultiInstance
protected int	m_NumClasses
protected int	m_NumDate
protected int	m_NumInstances
protected int	m_NumInstancesRelational
protected int	m_NumNominal
protected int	m_NumNominalValues
protected int	m_NumNumeric
protected int	m_NumRelational
protected int	m_NumRelationalDate
protected int	m_NumRelationalNominal
protected int	m_NumRelationalNominalValues
protected int	m_NumRelationalNumeric
protected int	m_NumRelationalString
protected int	m_NumString
protected Random	m_Random
protected String	m_Relation
protected Instances	m_RelationalClassFormat
protected Instances[]	m_RelationalFormat
protected int	m_Seed
protected String	m_WordSeparators
protected String[]	m_Words

Constructor Summary
public	TestInstances()

Method Summary
protected static String	arrayToList(String[] value)
public void	assign(TestInstances t)
public Object	clone()
public static TestInstances	forCapabilities(Capabilities c) returns a TestInstances instance setup already for the the given capabilities.
public Instances	generate() generates a new dataset.
protected Attribute	generateAttribute(int index, int attType)
protected double	generateAttributeValue(Instances data, int index, double classVal) Generates a new value for the specified attribute.
protected double	generateClassValue(Instances data)
public int	getClassIndex()
public int	getClassType()
public Instances	getData()
public CapabilitiesHandler	getHandler()
public boolean	getMultiInstance()
public boolean	getNoClass()
public int	getNumAttributes() returns the overall number of attributes (incl.
public int	getNumClasses()
public int	getNumDate()
public int	getNumInstances()
public int	getNumInstancesRelational()
public int	getNumNominal()
public int	getNumNominalValues()
public int	getNumNumeric()
public int	getNumRelational()
public int	getNumRelationalDate()
public int	getNumRelationalNominal()
public int	getNumRelationalNominalValues()
public int	getNumRelationalNumeric()
public int	getNumRelationalString()
public int	getNumString()
public String[]	getOptions() Gets the current settings of this object.
public String	getRelation()
public Instances	getRelationalClassFormat()
public Instances	getRelationalFormat(int index)
public int	getSeed()
public String	getWordSeparators() returns the word separators (chars) to use for assembling strings.
public String	getWords() returns the words used for assembling strings in a comma-separated list.
public Enumeration	listOptions() Returns an enumeration describing the available options.
protected static String[]	listToArray(String value)
public static void	main(String[] args)
public void	setClassIndex(int value)
public void	setClassType(int value)
public void	setHandler(CapabilitiesHandler value)
public void	setMultiInstance(boolean value)
public void	setNoClass(boolean value)
public void	setNumClasses(int value)
public void	setNumDate(int value)
public void	setNumInstances(int value)
public void	setNumInstancesRelational(int value)
public void	setNumNominal(int value)
public void	setNumNominalValues(int value)
public void	setNumNumeric(int value)
public void	setNumRelational(int value)
public void	setNumRelationalDate(int value)
public void	setNumRelationalNominal(int value)
public void	setNumRelationalNominalValues(int value)
public void	setNumRelationalNumeric(int value)
public void	setNumRelationalString(int value)
public void	setNumString(int value)
public void	setOptions(String[] options) Parses a given list of options.
public void	setRelation(String value)
public void	setRelationalClassFormat(Instances value)
public void	setRelationalFormat(int index, Instances value)
public void	setSeed(int value)
public void	setWordSeparators(String value) sets the word separators (chars) to use for assembling strings.
public void	setWords(String value) Sets the comma-separated list of words to use for generating strings.
public String	toString()

Field Detail

CLASS_IS_LAST
final public static int CLASS_IS_LAST(Code)
	can be used for settting the class attribute index to last See Also: TestInstances.setClassIndex(int) See Also:

DEFAULT_SEPARATORS
final public static String DEFAULT_SEPARATORS(Code)
	the default word separators used in strings

DEFAULT_WORDS
final public static String[] DEFAULT_WORDS(Code)
	the default list of words used in strings

NO_CLASS
final public static int NO_CLASS(Code)
	can be used to avoid generating a class attribute See Also: TestInstances.setClassIndex(int) See Also:

m_ClassIndex
protected int m_ClassIndex(Code)
	the class index (-1 is LAST, -2 means no class) See Also: TestInstances.CLASS_IS_LAST See Also: TestInstances.NO_CLASS See Also:

m_ClassType
protected int m_ClassType(Code)
	the class type

m_Data
protected Instances m_Data(Code)
	the generated data

m_Handler
protected CapabilitiesHandler m_Handler(Code)
	the CapabilitiesHandler to get the Capabilities from

m_MultiInstance
protected boolean m_MultiInstance(Code)
	whether to generate Multi-Instance data or not

m_NumClasses
protected int m_NumClasses(Code)
	the number of classes (in case of NOMINAL class)

m_NumDate
protected int m_NumDate(Code)
	the number of date attributes

m_NumInstances
protected int m_NumInstances(Code)
	the number of instances

m_NumInstancesRelational
protected int m_NumInstancesRelational(Code)
	the number of instances in relational attributes (applies also for bags in multi-instance)

m_NumNominal
protected int m_NumNominal(Code)
	the number of nominal attributes

m_NumNominalValues
protected int m_NumNominalValues(Code)
	the number of values for nominal attributes

m_NumNumeric
protected int m_NumNumeric(Code)
	the number of numeric attributes

m_NumRelational
protected int m_NumRelational(Code)
	the number of relational attributes

m_NumRelationalDate
protected int m_NumRelationalDate(Code)
	the number of date attributes in a relational attribute

m_NumRelationalNominal
protected int m_NumRelationalNominal(Code)
	the number of nominal attributes in a relational attribute

m_NumRelationalNominalValues
protected int m_NumRelationalNominalValues(Code)
	the number of values for nominal attributes in relational attributes

m_NumRelationalNumeric
protected int m_NumRelationalNumeric(Code)
	the number of numeric attributes in a relational attribute

m_NumRelationalString
protected int m_NumRelationalString(Code)
	the number of string attributes in a relational attribute

m_NumString
protected int m_NumString(Code)
	the number of string attributes

m_Random
protected Random m_Random(Code)
	the random number generator

m_Relation
protected String m_Relation(Code)
	the name of the relation

m_RelationalClassFormat
protected Instances m_RelationalClassFormat(Code)
	the format of the multi-instance data of the class

m_RelationalFormat
protected Instances[] m_RelationalFormat(Code)
	the format of the multi-instance data

m_Seed
protected int m_Seed(Code)
	the seed value

m_WordSeparators
protected String m_WordSeparators(Code)
	for generating String attributes/classes

m_Words
protected String[] m_Words(Code)
	for generating String attributes/classes

Constructor Detail

TestInstances
public TestInstances()(Code)
	the default constructor

Method Detail

arrayToList
protected static String arrayToList(String[] value)(Code)
	turns the array into a comma-separated list Parameters: value - the array to process the array as list

assign
public void assign(TestInstances t)(Code)
	updates itself with all the settings from the given TestInstances object Parameters: t - the object to get the settings from

clone
public Object clone()(Code)
	creates a clone of the current object a clone of the current object

forCapabilities
public static TestInstances forCapabilities(Capabilities c)(Code)
	returns a TestInstances instance setup already for the the given capabilities. Parameters: c - the capabilities to base the TestInstances on the configured TestInstances object

generate
public Instances generate() throws Exception(Code)
	generates a new dataset. the generated data throws: Exception - if something goes wrong

generateAttribute
protected Attribute generateAttribute(int index, int attType) throws Exception(Code)
	creates a new Attribute of the given type Parameters: index - the index of the current attribute (0-based) Parameters: attType - the attribute type (NUMERIC, NOMINAL, etc.) the configured attribute throws: Exception - if something goes wrong, e.g., an unknown attribute type See Also: Attribute.type See Also: TestInstances.CLASS_IS_LAST See Also: TestInstances.NO_CLASS

generateAttributeValue
protected double generateAttributeValue(Instances data, int index, double classVal) throws Exception(Code)
	Generates a new value for the specified attribute. The classValue might be used in the process. Parameters: data - the dataset to work on Parameters: index - the index of the attribute Parameters: classVal - the class value for the current instance, might be used in the calculation the new attribute value throws: Exception - if something goes wrong

generateClassValue
protected double generateClassValue(Instances data) throws Exception(Code)
	Generates the class value Parameters: data - the dataset to work on the new class value throws: Exception - if something goes wrong

getClassIndex
public int getClassIndex()(Code)
	returns the current class index (0-based), -1 is last attribute the class index See Also: TestInstances.CLASS_IS_LAST See Also: TestInstances.NO_CLASS

getClassType
public int getClassType()(Code)
	returns the current class type the class attribute type

getData
public Instances getData()(Code)
	returns the current dataset, can be null the current dataset

getHandler
public CapabilitiesHandler getHandler()(Code)
	returns the current set CapabilitiesHandler to generate the dataset for, can be null the handler to generate the data for

getMultiInstance
public boolean getMultiInstance()(Code)
	Gets whether multi-instance data (with a fixed structure) is generated true if multi-instance data is generated

getNoClass
public boolean getNoClass()(Code)
	whether no class attribute is generated true if no class attribute is generated

getNumAttributes
public int getNumAttributes()(Code)
	returns the overall number of attributes (incl. class, if that is also generated) the overall number of attributes

getNumClasses
public int getNumClasses()(Code)
	returns the current number of classes the number of classes

getNumDate
public int getNumDate()(Code)
	returns the current number of date attributes the number of date attributes

getNumInstances
public int getNumInstances()(Code)
	returns the current number of instances to produce the number of instances

getNumInstancesRelational
public int getNumInstancesRelational()(Code)
	returns the current number of instances in relational/bag attributes to produce the number of instances

getNumNominal
public int getNumNominal()(Code)
	returns the current number of nominal attributes the number of nominal attributes

getNumNominalValues
public int getNumNominalValues()(Code)
	returns the current number of values for nominal attributes the number of values

getNumNumeric
public int getNumNumeric()(Code)
	returns the current number of numeric attributes the number of numeric attributes

getNumRelational
public int getNumRelational()(Code)
	returns the current number of relational attributes the number of relational attributes

getNumRelationalDate
public int getNumRelationalDate()(Code)
	returns the current number of date attributes in a relational attribute the number of date attributes

getNumRelationalNominal
public int getNumRelationalNominal()(Code)
	returns the current number of nominal attributes in a relational attribute the number of nominal attributes

getNumRelationalNominalValues
public int getNumRelationalNominalValues()(Code)
	returns the current number of values for nominal attributes in a relational attribute the number of values

getNumRelationalNumeric
public int getNumRelationalNumeric()(Code)
	returns the current number of numeric attributes in a relational attribute the number of numeric attributes

getNumRelationalString
public int getNumRelationalString()(Code)
	returns the current number of string attributes in a relational attribute the number of string attributes

getNumString
public int getNumString()(Code)
	returns the current number of string attributes the number of string attributes

getOptions
public String[] getOptions()(Code)
	Gets the current settings of this object. an array of strings suitable for passing to setOptions

getRelation
public String getRelation()(Code)
	returns the current name of the relation the name of the relation

getRelationalClassFormat
public Instances getRelationalClassFormat()(Code)
	returns the current strcuture of the relational class attribute, can be null the relational structure of the class attribute

getRelationalFormat
public Instances getRelationalFormat(int index)(Code)
	returns the format for the specified relational attribute, can be null Parameters: index - the index of the relational attribute the current structure

getSeed
public int getSeed()(Code)
	returns the current seed value the seed value

getWordSeparators
public String getWordSeparators()(Code)
	returns the word separators (chars) to use for assembling strings. the current separators

getWords
public String getWords()(Code)
	returns the words used for assembling strings in a comma-separated list. the words as comma-separated list

listOptions
public Enumeration listOptions()(Code)
	Returns an enumeration describing the available options. an enumeration of all the available options.

listToArray
protected static String[] listToArray(String value)(Code)
	turns the comma-separated list into an array Parameters: value - the list to process the list as array

main
public static void main(String[] args) throws Exception(Code)
	for running the class from commandline, prints the generated data to stdout Parameters: args - the commandline parameters throws: Exception - if something goes wrong

setClassIndex
public void setClassIndex(int value)(Code)
	sets the class index (0-based) Parameters: value - the class index See Also: TestInstances.CLASS_IS_LAST See Also: TestInstances.NO_CLASS

setClassType
public void setClassType(int value)(Code)
	sets the class attribute type Parameters: value - the class attribute type

setHandler
public void setHandler(CapabilitiesHandler value)(Code)
	sets the Capabilities handler to generate the data for Parameters: value - the handler to generate the data for

setMultiInstance
public void setMultiInstance(boolean value)(Code)
	sets whether multi-instance data should be generated (with a fixed data structure) Parameters: value - whether multi-instance data is generated

setNoClass
public void setNoClass(boolean value)(Code)
	whether to have no class, e.g., for clusterers; otherwise the class attribute index is set to last Parameters: value - whether to have no class See Also: TestInstances.CLASS_IS_LAST See Also: TestInstances.NO_CLASS

setNumClasses
public void setNumClasses(int value)(Code)
	sets the number of classes Parameters: value - the number of classes

setNumDate
public void setNumDate(int value)(Code)
	sets the number of date attributes Parameters: value - the number of date attributes

setNumInstances
public void setNumInstances(int value)(Code)
	sets the number of instances to produce Parameters: value - the number of instances

setNumInstancesRelational
public void setNumInstancesRelational(int value)(Code)
	sets the number of instances in relational/bag attributes to produce Parameters: value - the number of instances

setNumNominal
public void setNumNominal(int value)(Code)
	sets the number of nominal attributes Parameters: value - the number of nominal attributes

setNumNominalValues
public void setNumNominalValues(int value)(Code)
	sets the number of values for nominal attributes Parameters: value - the number of values

setNumNumeric
public void setNumNumeric(int value)(Code)
	sets the number of numeric attributes Parameters: value - the number of numeric attributes

setNumRelational
public void setNumRelational(int value)(Code)
	sets the number of relational attributes Parameters: value - the number of relational attributes

setNumRelationalDate
public void setNumRelationalDate(int value)(Code)
	sets the number of date attributes in a relational attribute Parameters: value - the number of date attributes

setNumRelationalNominal
public void setNumRelationalNominal(int value)(Code)
	sets the number of nominal attributes in a relational attribute Parameters: value - the number of nominal attributes

setNumRelationalNominalValues
public void setNumRelationalNominalValues(int value)(Code)
	sets the number of values for nominal attributes in a relational attribute Parameters: value - the number of values

setNumRelationalNumeric
public void setNumRelationalNumeric(int value)(Code)
	sets the number of numeric attributes in a relational attribute Parameters: value - the number of numeric attributes

setNumRelationalString
public void setNumRelationalString(int value)(Code)
	sets the number of string attributes in a relational attribute Parameters: value - the number of string attributes

setNumString
public void setNumString(int value)(Code)
	sets the number of string attributes Parameters: value - the number of string attributes

setOptions

public void setOptions(String[] options) throws Exception(Code)

Parses a given list of options.

Valid options are:

 -relation <name>
 The name of the data set.

 -seed <num>
 The seed value.

 -num-instances <num>
 The number of instances in the datasets (default 20).

 -class-type <num>
 The class type, see constants in weka.core.Attribute
 (default 1=nominal).

 -class-values <num>
 The number of classes to generate (for nominal classes only)
 (default 2).

 -class-index <num>
 The class index, with -1=last, (default -1).

 -no-class
 Doesn't include a class attribute in the output.

 -nominal <num>
 The number of nominal attributes (default 1).

 -nominal-values <num>
 The number of values for nominal attributes (default 2).

 -numeric <num>
 The number of numeric attributes (default 0).

 -string <num>
 The number of string attributes (default 0).

 -words <comma-separated-list>
 The words to use in string attributes.

 -word-separators <chars>
 The word separators to use in string attributes.

 -date <num>
 The number of date attributes (default 0).

 -relational <num>
 The number of relational attributes (default 0).

 -relational-nominal <num>
 The number of nominal attributes in a rel. attribute (default 1).

 -relational-nominal-values <num>
 The number of values for nominal attributes in a rel. attribute (default 2).

 -relational-numeric <num>
 The number of numeric attributes in a rel. attribute (default 0).

 -relational-string <num>
 The number of string attributes in a rel. attribute (default 0).

 -relational-date <num>
 The number of date attributes in a rel. attribute (default 0).

 -num-instances-relational <num>
 The number of instances in relational/bag attributes (default 10).

 -multi-instance
 Generates multi-instance data.

 -W <classname>
 The Capabilities handler to base the dataset on.
 The other parameters can be used to override the ones
 determined from the handler. Additional parameters for
 handler can be passed on after the '--'.

Parameters:
options - the list of options as an array of strings
throws:
Exception - if an option is not supported

setRelation
public void setRelation(String value)(Code)
	sets the name of the relation Parameters: value - the name of the relation

setRelationalClassFormat
public void setRelationalClassFormat(Instances value)(Code)
	sets the structure for the relational class attribute Parameters: value - the structure for the relational attribute

setRelationalFormat
public void setRelationalFormat(int index, Instances value)(Code)
	sets the structure for the bags for the relational attribute Parameters: index - the index of the relational attribute Parameters: value - the new structure

setSeed
public void setSeed(int value)(Code)
	sets the seed value for the random number generator Parameters: value - the seed

setWordSeparators
public void setWordSeparators(String value)(Code)
	sets the word separators (chars) to use for assembling strings. Parameters: value - the characters to use as separators

setWords
public void setWords(String value)(Code)
	Sets the comma-separated list of words to use for generating strings. The list must contain at least 2 words, otherwise an exception will be thrown. Parameters: value - the list of words throws: IllegalArgumentException - if not at least 2 words are provided

toString
public String toString()(Code)
	returns a string representation of the object a string representation of the object

Methods inherited from java.lang.Object

native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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