类 NominalToBinary

java.lang.Object
weka.filters.Filter
weka.filters.unsupervised.attribute.NominalToBinary
所有已实现的接口:
Serializable, CapabilitiesHandler, OptionHandler, RevisionHandler, StreamableFilter, UnsupervisedFilter

public class NominalToBinary extends Filter implements UnsupervisedFilter, OptionHandler, StreamableFilter
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, you might want to use the supervised version of this filter.

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.
 -R <col1,col2-col4,...>
  Specifies list of columns to act on. First and last are 
  valid indexes.
  (default: first-last)
 -V
  Invert matching sense of column indexes.
版本:
$Revision: 9819 $
作者:
Eibe Frank (eibe@cs.waikato.ac.nz)
另请参阅:
  • 构造器详细资料

    • NominalToBinary

      public NominalToBinary()
      Constructor - initialises the filter
  • 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
    • 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
    • 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.
       -R <col1,col2-col4,...>
        Specifies list of columns to act on. First and last are 
        valid indexes.
        (default: first-last)
       -V
        Invert matching sense of column indexes.
      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
    • invertSelectionTipText

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

      public boolean getInvertSelection()
      Gets whether the supplied columns are to be removed or kept
      返回:
      true if the supplied columns will be kept
    • setInvertSelection

      public void setInvertSelection(boolean invert)
      Sets whether selected columns should be removed or kept. If true the selected columns are kept and unselected columns are deleted. If false selected columns are deleted and unselected columns are kept.
      参数:
      invert - the new invert setting
    • attributeIndicesTipText

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

      public String getAttributeIndices()
      Gets the current range selection
      返回:
      a string containing a comma separated list of ranges
    • setAttributeIndices

      public void setAttributeIndices(String rangeList)
      Sets which attributes are to be acted on.
      参数:
      rangeList - a string representing the list of attributes. Since the string will typically come from a user, attributes are indexed from 1.
      eg: first-3,5,6-last
      抛出:
      IllegalArgumentException - if an invalid range list is supplied
    • 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