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## weka.filters.unsupervised.attribute
Class AddID

    java.lang.Object
      weka.filters.Filter
          weka.filters.unsupervised.attribute.AddID

All Implemented Interfaces:
  java.io.Serializable, CapabilitiesHandler, OptionHandler, RevisionHandler, UnsupervisedFilter

    public class AddID

extends Filter
implements UnsupervisedFilter, OptionHandler

An instance filter that adds an ID attribute to the dataset. The new attribute contains a unique ID for each instance.
Note: The ID is not reset for the second batch of files (using -b and -r and -s).

Valid options are:

     -C <index>
      Specify where to insert the ID. First and last
      are valid indexes.(default first)

     -N <name>
      Name of the new attribute.
      (default = 'ID')

Version:
  $Revision: 5987 $
Author:
  fracpete (fracpete at waikato dot ac dot nz)
See Also:
  Serialized Form

Constructor Summary
`AddID()`

Method Summary
`java.lang.String` | `attributeNameTipText()` Returns the tip text for this property
`boolean` | `batchFinished()` Signify that this batch of input to the filter is finished.
`java.lang.String` | `getAttributeName()` Get the name of the attribute to be created
`Capabilities` | `getCapabilities()` Returns the Capabilities of this filter.
`java.lang.String` | `getIDIndex()` Get the index of the attribute used.
`java.lang.String[]` | `getOptions()` Gets the current settings of the filter.
`java.lang.String` | `getRevision()` Returns the revision string.
`java.lang.String` | `globalInfo()` Returns a string describing this filter
`java.lang.String` | `IDIndexTipText()` Returns the tip text for this property
`boolean` | `input(Instance instance)` Input an instance for filtering.
`java.util.Enumeration` | `listOptions()` Returns an enumeration describing the available options.
`static void` | `main(java.lang.String[] args)` Main method for testing this class.
`void` | `setAttributeName(java.lang.String value)` Set the new attribute's name
`void` | `setIDIndex(java.lang.String value)` Sets index of the attribute used.
`boolean` | `setInputFormat(Instances instanceInfo)` Sets the format of the input instances.
`void` | `setOptions(java.lang.String[] options)` Parses a given list of options.

Methods inherited from class weka.filters.Filter
`batchFilterFile, filterFile, getCapabilities, getOutputFormat, isFirstBatchDone, isNewBatch, isOutputFormatDefined, makeCopies, makeCopy, numPendingOutput, output, outputPeek, toString, useFilter, wekaStaticWrapper`

Methods inherited from class java.lang.Object
`equals, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Constructor Detail

### AddID

    public AddID()

Method Detail

### globalInfo

    public java.lang.String globalInfo()

  Returns a string describing this filter

  Returns:
    a description of the filter suitable for displaying in the explorer/experimenter gui

### listOptions

    public java.util.Enumeration listOptions()

  Returns an enumeration describing the available options.

  Specified by:
    `listOptions` in interface `OptionHandler`
  Returns:
    an enumeration of all the available options.

### setOptions

    public void setOptions(java.lang.String[] options)
                    throws java.lang.Exception

  Parses a given list of options.

  Valid options are:

       -C <index>
        Specify where to insert the ID. First and last
        are valid indexes.(default first)

       -N <name>
        Name of the new attribute.
        (default = 'ID')

  Specified by:
    `setOptions` in interface `OptionHandler`
  Parameters:
    `options` - the list of options as an array of strings
  Throws:
    `java.lang.Exception` - if an option is not supported

### getOptions

    public java.lang.String[] getOptions()

  Gets the current settings of the filter.

  Specified by:
    `getOptions` in interface `OptionHandler`
  Returns:
    an array of strings suitable for passing to setOptions

### attributeNameTipText

    public java.lang.String attributeNameTipText()

  Returns the tip text for this property

  Returns:
    tip text for this property suitable for displaying in the explorer/experimenter gui

### getAttributeName

    public java.lang.String getAttributeName()

  Get the name of the attribute to be created

  Returns:
    the current attribute name

### setAttributeName

    public void setAttributeName(java.lang.String value)

  Set the new attribute's name

  Parameters:
    `value` - the new name

### IDIndexTipText

    public java.lang.String IDIndexTipText()

  Returns the tip text for this property

  Returns:
    tip text for this property suitable for displaying in the explorer/experimenter gui

### getIDIndex

    public java.lang.String getIDIndex()

  Get the index of the attribute used.

  Returns:
    the index of the attribute

### setIDIndex

    public void setIDIndex(java.lang.String value)

  Sets index of the attribute used.

  Parameters:
    `value` - the index of the attribute

### getCapabilities

    public Capabilities getCapabilities()

  Returns the Capabilities of this filter.

  Specified by:
    `getCapabilities` in interface `CapabilitiesHandler`
  Overrides:
    `getCapabilities` in class `Filter`
  Returns:
    the capabilities of this object
  See Also:
    `Capabilities`

### setInputFormat

    public boolean setInputFormat(Instances instanceInfo)
                           throws java.lang.Exception

  Sets the format of the input instances.

  Overrides:
    `setInputFormat` in class `Filter`
  Parameters:
    `instanceInfo` - an Instances object containing the input instance structure (any instances contained in the object are ignored - only the structure is required).
  Returns:
    true if the outputFormat may be collected immediately
  Throws:
    `java.lang.Exception` - if the format couldn'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.

  Overrides:
    `input` in class `Filter`
  Parameters:
    `instance` - the input instance
  Returns:
    true if the filtered instance may now be collected with output().
  Throws:
    `java.lang.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.

  Overrides:
    `batchFinished` in class `Filter`
  Returns:
    true if there are instances pending output
  Throws:
    `java.lang.IllegalStateException` - if no input structure has been defined

### getRevision

    public java.lang.String getRevision()

  Returns the revision string.

  Specified by:
    `getRevision` in interface `RevisionHandler`
  Overrides:
    `getRevision` in class `Filter`
  Returns:
    the revision

### main

    public static void main(java.lang.String[] args)

  Main method for testing this class.

  Parameters:
    `args` - should contain arguments to the filter: use -h for help

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