Class MixedGenerator

  • All Implemented Interfaces:
    Configurable, Serializable, CapabilitiesHandler, MOAObject, OptionHandler, ExampleStream<Example<Instance>>, InstanceStream

    public class MixedGenerator
    extends AbstractOptionHandler
    implements InstanceStream
    Abrupt concept drift, boolean noise-free examples. Four relevant attributes, two boolean attributes v,w and two numeric attributes from [0; 1]. The examples are classified positive if two of three conditions are satisfied: v,w, y < 0,5 + 0,3 sin(3 * PI * x). After each context change the classification is reversed. Proposed by "Gama, Joao, et al. "Learning with drift detection." Advances in artificial intelligence–SBIA 2004. Springer Berlin Heidelberg, 2004. 286-295."
    Version:
    $Revision: 1 $
    Author:
    Paulo Gonçalves (paulogoncalves@recife.ifpe.edu.br)
    See Also:
    Serialized Form
    • Field Detail

      • functionOption

        public IntOption functionOption
      • instanceRandomSeedOption

        public IntOption instanceRandomSeedOption
      • balanceClassesOption

        public FlagOption balanceClassesOption
      • instanceRandom

        protected Random instanceRandom
      • nextClassShouldBeZero

        protected boolean nextClassShouldBeZero
    • Constructor Detail

      • MixedGenerator

        public MixedGenerator()
    • Method Detail

      • getDescription

        public void getDescription​(StringBuilder sb,
                                   int indent)
        Description copied from interface: MOAObject
        Returns a string representation of this object. Used in AbstractMOAObject.toString to give a string representation of the object.
        Specified by:
        getDescription in interface MOAObject
        Parameters:
        sb - the stringbuilder to add the description
        indent - the number of characters to indent
      • getHeader

        public InstancesHeader getHeader()
        Description copied from interface: ExampleStream
        Gets the header of this stream. This is useful to know attributes and classes. InstancesHeader is an extension of weka.Instances.
        Specified by:
        getHeader in interface ExampleStream<Example<Instance>>
        Returns:
        the header of this stream
      • estimatedRemainingInstances

        public long estimatedRemainingInstances()
        Description copied from interface: ExampleStream
        Gets the estimated number of remaining instances in this stream
        Specified by:
        estimatedRemainingInstances in interface ExampleStream<Example<Instance>>
        Returns:
        the estimated number of instances to get from this stream
      • hasMoreInstances

        public boolean hasMoreInstances()
        Description copied from interface: ExampleStream
        Gets whether this stream has more instances to output. This is useful when reading streams from files.
        Specified by:
        hasMoreInstances in interface ExampleStream<Example<Instance>>
        Returns:
        true if this stream has more instances to output
      • prepareForUseImpl

        protected void prepareForUseImpl​(TaskMonitor monitor,
                                         ObjectRepository repository)
        Description copied from class: AbstractOptionHandler
        This method describes the implementation of how to prepare this object for use. All classes that extends this class have to implement prepareForUseImpl and not prepareForUse since prepareForUse calls prepareForUseImpl.
        Specified by:
        prepareForUseImpl in class AbstractOptionHandler
        Parameters:
        monitor - the TaskMonitor to use
        repository - the ObjectRepository to use