类 StringToNominal

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

public class StringToNominal extends Filter implements UnsupervisedFilter, OptionHandler
Converts a string attribute (i.e. unspecified number of values) to nominal (i.e. set number of values). You should ensure that all string values that will appear are represented in the first batch of the data.

Valid options are:

 -R <col>
  Sets the range of attribute indices (default last).
 
版本:
$Revision: 9273 $
作者:
Len Trigg (len@reeltwo.com)
另请参阅:
  • 构造器详细资料

    • StringToNominal

      public StringToNominal()
  • 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:
      UnsupportedAttributeTypeException - if the selected attribute a string attribute.
      Exception - if the input format can't be set successfully.
    • input

      public boolean input(Instance instance)
      Input an instance for filtering. The instance is processed and made available for output immediately.
      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 structure has been defined.
    • batchFinished

      public boolean batchFinished()
      Signifies 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<Option> 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:

       -R <col>
        Sets the range of attribute indices (default last).
       
       -V <col>
        Inverts the selection specified by -R.
       
      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
    • attributeRangeTipText

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

      public String getAttributeRange()
      Get the range of indices of the attributes used.
      返回:
      the index of the attribute
    • setAttributeRange

      public void setAttributeRange(String rangeList)
      Sets range of indices of the attributes used.
      参数:
      attIndex - the index of the attribute
    • 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