类 Normalize

所有已实现的接口:
Serializable, CapabilitiesHandler, OptionHandler, RevisionHandler, Sourcable, UnsupervisedFilter

public class Normalize extends PotentialClassIgnorer implements UnsupervisedFilter, Sourcable, OptionHandler
Normalizes all numeric values in the given dataset (apart from the class attribute, if set). The resulting values are by default in [0,1] for the data used to compute the normalization intervals. But with the scale and translation parameters one can change that, e.g., with scale = 2.0 and translation = -1.0 you get values in the range [-1,+1].

Valid options are:

 -unset-class-temporarily
  Unsets the class index temporarily before the filter is
  applied to the data.
  (default: no)
 -S <num>
  The scaling factor for the output range.
  (default: 1.0)
 -T <num>
  The translation of the output range.
  (default: 0.0)
版本:
$Revision: 5543 $
作者:
Eibe Frank (eibe@cs.waikato.ac.nz), FracPete (fracpete at waikato dot ac dot nz)
另请参阅:
  • 构造器详细资料

    • Normalize

      public Normalize()
  • 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
    • listOptions

      public Enumeration listOptions()
      Returns an enumeration describing the available options.
      指定者:
      listOptions 在接口中 OptionHandler
      覆盖:
      listOptions 在类中 PotentialClassIgnorer
      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:

       -unset-class-temporarily
        Unsets the class index temporarily before the filter is
        applied to the data.
        (default: no)
       -S <num>
        The scaling factor for the output range.
        (default: 1.0)
       -T <num>
        The translation of the output range.
        (default: 0.0)
      指定者:
      setOptions 在接口中 OptionHandler
      覆盖:
      setOptions 在类中 PotentialClassIgnorer
      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
      覆盖:
      getOptions 在类中 PotentialClassIgnorer
      返回:
      an array of strings suitable for passing to setOptions
    • 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 PotentialClassIgnorer
      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) throws Exception
      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:
      Exception - if an error occurs
      IllegalStateException - if no input format has been set.
    • batchFinished

      public boolean batchFinished() throws Exception
      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:
      Exception - if an error occurs
      IllegalStateException - if no input structure has been defined
    • toSource

      public String toSource(String className, Instances data) throws Exception
      Returns a string that describes the filter as source. The filter will be contained in a class with the given name (there may be auxiliary classes), and will contain two methods with these signatures:
      
       // converts one row
       public static Object[] filter(Object[] i);
       // converts a full dataset (first dimension is row index)
       public static Object[][] filter(Object[][] i);
       
      where the array i contains elements that are either Double, String, with missing values represented as null. The generated code is public domain and comes with no warranty.
      指定者:
      toSource 在接口中 Sourcable
      参数:
      className - the name that should be given to the source class.
      data - the dataset used for initializing the filter
      返回:
      the object source described by a string
      抛出:
      Exception - if the source can't be computed
    • getMinArray

      public double[] getMinArray()
      Returns the calculated minimum values for the attributes in the data.
      返回:
      the array with the minimum values
    • getMaxArray

      public double[] getMaxArray()
      Returns the calculated maximum values for the attributes in the data.
      返回:
      the array with the maximum values
    • scaleTipText

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

      public double getScale()
      Get the scaling factor.
      返回:
      the factor
    • setScale

      public void setScale(double value)
      Sets the scaling factor.
      参数:
      value - the scaling factor
    • translationTipText

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

      public double getTranslation()
      Get the translation.
      返回:
      the translation
    • setTranslation

      public void setTranslation(double value)
      Sets the translation.
      参数:
      value - the translation
    • 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[] args)
      Main method for running this filter.
      参数:
      args - should contain arguments to the filter, use -h for help