Java weka.core Instance fields, constructors, methods, implement or subclass

Introduction

In this page you can find the methods, fields and constructors for weka.core Instance.

The text is from its open source code.

Subclass

weka.core.Instance has subclasses.
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Implementation

weka.core.Instance has the following implementations.
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Method

Attribute	attribute(int index) Returns the attribute with the given index.
Attribute	attributeSparse(int indexOfIndex) Returns the attribute with the given index in the sparse representation.
Attribute	classAttribute() Returns class attribute.
int	classIndex() Returns the class attribute's index.
boolean	classIsMissing() Tests if an instance's class is missing.
double	classValue() Returns an instance's class value as a floating-point number.
Object	copy() This method produces a shallow copy of an object.
Instance	copy(double[] values) Copies the instance but fills up its values based on the given array of doubles.
Instances	dataset() Returns the dataset this instance has access to.
void	deleteAttributeAt(int position) Deletes an attribute at the given position (0 to numAttributes() - 1).
Enumeration	enumerateAttributes() Returns an enumeration of all the attributes.
boolean	hasMissingValue() Tests whether an instance has a missing value.
int	index(int position) Returns the index of the attribute stored at the given position in the sparse representation.
void	insertAttributeAt(int position) Inserts an attribute at the given position (0 to numAttributes()).
boolean	isMissing(int attIndex) Tests if a specific value is "missing".
boolean	isMissing(Attribute att) Tests if a specific value is "missing".
boolean	isMissingSparse(int indexOfIndex) Tests if a specific value is "missing" in the sparse representation.
int	numAttributes() Returns the number of attributes.
int	numClasses() Returns the number of class labels.
int	numValues() Returns the number of values present in a sparse representation.
Instances	relationalValue(int attIndex) Returns the relational value of a relational attribute.
Instances	relationalValue(Attribute att) Returns the relational value of a relational attribute.
void	replaceMissingValues(double[] array) Replaces all missing values in the instance with the values contained in the given array.
void	setClassMissing() Sets the class value of an instance to be "missing".
void	setClassValue(double value) Sets the class value of an instance to the given value (internal floating-point format).
void	setClassValue(String value) Sets the class value of an instance to the given value.
void	setDataset(Instances instances) Sets the reference to the dataset.
void	setMissing(int attIndex) Sets a specific value to be "missing".
void	setMissing(Attribute att) Sets a specific value to be "missing".
void	setValue(int attIndex, double value) Sets a specific value in the instance to the given value (internal floating-point format).
void	setValue(int attIndex, String value) Sets a value of a nominal or string attribute to the given value.
void	setValue(Attribute att, double value) Sets a specific value in the instance to the given value (internal floating-point format).
void	setValue(Attribute att, String value) Sets a value of an nominal or string attribute to the given value.
void	setValueSparse(int indexOfIndex, double value) Sets a specific value in the instance to the given value (internal floating-point format), given an index into the sparse representation.
void	setWeight(double weight) Sets the weight of an instance.
String	stringValue(int attIndex) Returns the value of a nominal, string, date, or relational attribute for the instance as a string.
String	stringValue(Attribute att) Returns the value of a nominal, string, date, or relational attribute for the instance as a string.
double[]	toDoubleArray() Returns the values of each attribute as an array of doubles.
String	toString(int attIndex) Returns the description of one value of the instance as a string.
String	toString(Attribute att) Returns the description of one value of the instance as a string.
double	value(int attIndex) Returns an instance's attribute value in internal format.
double	value(Attribute att) Returns an instance's attribute value in internal format.
double	valueSparse(int indexOfIndex) Returns an instance's attribute value in internal format, given an index in the sparse representation.
double	weight() Returns the instance's weight.