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## Package weka.core

Interface Summary
AdditionalMeasureProducer | Interface to something that can produce measures other than those calculated by evaluation modules.
Copyable | Interface implemented by classes that can produce "shallow" copies of their objects.
Drawable | Interface to something that can be drawn as a graph.
Matchable | Interface to something that can be matched with tree matching algorithms.
OptionHandler | Interface to something that understands options.
Randomizable | Interface to something that has random behaviour that is able to be seeded with an integer.
Summarizable | Interface to something that provides a short textual summary (as opposed to toString() which is usually a fairly complete description) of itself.
Undoable | Interface implemented by classes that support undo.
WeightedInstancesHandler | Interface to something that makes use of the information provided by instance weights.

Class Summary
Attribute | Class for handling an attribute.
AttributeStats | A Utility class that contains summary information on an the values that appear in a dataset for a particular attribute.
BinarySparseInstance | Class for storing a binary-data-only instance as a sparse vector.
CheckOptionHandler | Simple command line checking of classes that implement OptionHandler.
ContingencyTables | Class implementing some statistical routines for contingency tables.
FastVector | Implements a fast vector class without synchronized methods.
Instance | Class for handling an instance.
InstanceComparator | A comparator for the Instance class.
Instances | Class for handling an ordered set of weighted instances.
Matrix | Deprecated. Use instead `weka.core.matrix.Matrix` - only for backwards compatibility.
Memory | A little helper class for Memory management.
Optimization | Implementation of Active-sets method with BFGS update to solve optimization problem with only bounds constraints in multi-dimensions.
Option | Class to store information about an option.
ProtectedProperties | Simple class that extends the Properties class so that the properties are unable to be modified.
Queue | Class representing a FIFO queue.
RandomVariates | Class implementing some simple random variates generator.
Range | Class representing a range of cardinal numbers.
RTSI | This utility class is looking for all the classes implementing or inheriting from a given interface or class. (RTSI = RunTime Subclass Identification)
SelectedTag | Represents a selected value from a finite set of values, where each value is a Tag (i.e.
SerializedObject | Class for storing an object in serialized form in memory.
SingleIndex | Class representing a single cardinal number.
SparseInstance | Class for storing an instance as a sparse vector.
SpecialFunctions | Class implementing some mathematical functions.
Statistics | Class implementing some distributions, tests, etc.
Stopwords | Class that can test whether a given string is a stop word.
SystemInfo | This class prints some information about the system setup, like Java version, JVM settings etc.
Tag | A `Tag` simply associates a numeric ID with a String description.
Utils | Class implementing some simple utility methods.
Version | This class contains the version number of the current WEKA release and some methods for comparing another version string.

Exception Summary
NoSupportForMissingValuesException | Exception that is raised by an object that is unable to process data with missing values.
UnassignedClassException | Exception that is raised when trying to use some data that has no class assigned to it, but a class is needed to perform the operation.
UnassignedDatasetException | Exception that is raised when trying to use something that has no reference to a dataset, when one is required.
UnsupportedAttributeTypeException | Exception that is raised by an object that is unable to process some of the attribute types it has been passed.
UnsupportedClassTypeException | Exception that is raised by an object that is unable to process the class type of the data it has been passed.
WekaException | Class for Weka-specific exceptions.

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