类 NominalToBinary

java.lang.Object
weka.filters.Filter
weka.filters.supervised.attribute.NominalToBinary
所有已实现的接口:
Serializable, CapabilitiesHandler, OptionHandler, RevisionHandler, TechnicalInformationHandler, SupervisedFilter

public class NominalToBinary extends Filter implements SupervisedFilter, OptionHandler, TechnicalInformationHandler
Converts all nominal attributes into binary numeric attributes. An attribute with k values is transformed into k binary attributes if the class is nominal (using the one-attribute-per-value approach). Binary attributes are left binary, if option '-A' is not given.If the class is numeric, k - 1 new binary attributes are generated in the manner described in "Classification and Regression Trees" by Breiman et al. (i.e. taking the average class value associated with each attribute value into account)

For more information, see:

L. Breiman, J.H. Friedman, R.A. Olshen, C.J. Stone (1984). Classification and Regression Trees. Wadsworth Inc.

BibTeX:

 @book{Breiman1984,
    author = {L. Breiman and J.H. Friedman and R.A. Olshen and C.J. Stone},
    publisher = {Wadsworth Inc},
    title = {Classification and Regression Trees},
    year = {1984},
    ISBN = {0412048418}
 }
 

Valid options are:

 -N
  Sets if binary attributes are to be coded as nominal ones.
 -A
  For each nominal value a new attribute is created, 
  not only if there are more than 2 values.
版本:
$Revision: 8094 $
作者:
Eibe Frank (eibe@cs.waikato.ac.nz)
另请参阅:
  • 构造器详细资料

    • NominalToBinary

      public NominalToBinary()
  • 方法详细资料

    • globalInfo

      public String globalInfo()
      Returns a string describing this filter
      返回:
      a description of the filter suitable for displaying in the explorer/experimenter gui
    • getTechnicalInformation

      public TechnicalInformation getTechnicalInformation()
      Returns an instance of a TechnicalInformation object, containing detailed information about the technical background of this class, e.g., paper reference or book this class is based on.
      指定者:
      getTechnicalInformation 在接口中 TechnicalInformationHandler
      返回:
      the technical information about this class
    • getCapabilities

      public Capabilities getCapabilities()
      Returns the Capabilities of this filter.
      指定者:
      getCapabilities 在接口中 CapabilitiesHandler
      覆盖:
      getCapabilities 在类中 Filter
      返回:
      the capabilities of this object
      另请参阅:
    • setInputFormat

      public boolean setInputFormat(Instances instanceInfo) throws Exception
      Sets the format of the input instances.
      覆盖:
      setInputFormat 在类中 Filter
      参数:
      instanceInfo - an Instances object containing the input instance structure (any instances contained in the object are ignored - only the structure is required).
      返回:
      true if the outputFormat may be collected immediately
      抛出:
      Exception - if the input format can't be set successfully
    • input

      public boolean input(Instance instance)
      Input an instance for filtering. Filter requires all training instances be read before producing output.
      覆盖:
      input 在类中 Filter
      参数:
      instance - the input instance
      返回:
      true if the filtered instance may now be collected with output().
      抛出:
      IllegalStateException - if no input format has been set
    • batchFinished

      public boolean batchFinished()
      Signify that this batch of input to the filter is finished. If the filter requires all instances prior to filtering, output() may now be called to retrieve the filtered instances.
      覆盖:
      batchFinished 在类中 Filter
      返回:
      true if there are instances pending output
      抛出:
      IllegalStateException - if no input structure has been defined
    • listOptions

      public Enumeration listOptions()
      Returns an enumeration describing the available options.
      指定者:
      listOptions 在接口中 OptionHandler
      返回:
      an enumeration of all the available options.
    • setOptions

      public void setOptions(String[] options) throws Exception
      Parses a given list of options.

      Valid options are:

       -N
        Sets if binary attributes are to be coded as nominal ones.
       -A
        For each nominal value a new attribute is created, 
        not only if there are more than 2 values.
      指定者:
      setOptions 在接口中 OptionHandler
      参数:
      options - the list of options as an array of strings
      抛出:
      Exception - if an option is not supported
    • getOptions

      public String[] getOptions()
      Gets the current settings of the filter.
      指定者:
      getOptions 在接口中 OptionHandler
      返回:
      an array of strings suitable for passing to setOptions
    • binaryAttributesNominalTipText

      public String binaryAttributesNominalTipText()
      Returns the tip text for this property
      返回:
      tip text for this property suitable for displaying in the explorer/experimenter gui
    • getBinaryAttributesNominal

      public boolean getBinaryAttributesNominal()
      Gets if binary attributes are to be treated as nominal ones.
      返回:
      true if binary attributes are to be treated as nominal ones
    • setBinaryAttributesNominal

      public void setBinaryAttributesNominal(boolean bool)
      Sets if binary attributes are to be treates as nominal ones.
      参数:
      bool - true if binary attributes are to be treated as nominal ones
    • transformAllValuesTipText

      public String transformAllValuesTipText()
      Returns the tip text for this property
      返回:
      tip text for this property suitable for displaying in the explorer/experimenter gui
    • getTransformAllValues

      public boolean getTransformAllValues()
      Gets if all nominal values are turned into new attributes, not only if there are more than 2.
      返回:
      true all nominal values are transformed into new attributes
    • setTransformAllValues

      public void setTransformAllValues(boolean bool)
      Sets whether all nominal values are transformed into new attributes, not just if there are more than 2.
      参数:
      bool - true if all nominal value are transformed into new attributes
    • getRevision

      public String getRevision()
      Returns the revision string.
      指定者:
      getRevision 在接口中 RevisionHandler
      覆盖:
      getRevision 在类中 Filter
      返回:
      the revision
    • main

      public static void main(String[] argv)
      Main method for testing this class.
      参数:
      argv - should contain arguments to the filter: use -h for help