weka.filters.unsupervised.attribute
Class ReplaceMissingValuesWithZero

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

All Implemented Interfaces:

Serializable, weka.core.CapabilitiesHandler, weka.core.RevisionHandler, weka.filters.StreamableFilter, weka.filters.UnsupervisedFilter

public class ReplaceMissingValuesWithZero
extends weka.filters.Filter
implements weka.filters.UnsupervisedFilter, weka.filters.StreamableFilter

Replaces all missing values for nominal and numeric attributes in a dataset with the modes and means from the training data.

Version:

$Revision: 4584 $

Author:

Eibe Frank (eibe@cs.waikato.ac.nz)

See Also:

Serialized Form

Field Summary

Fields inherited from class weka.filters.Filter

m_FirstBatchDone, m_InputRelAtts, m_InputStringAtts, m_NewBatch, m_OutputRelAtts, m_OutputStringAtts

Constructor Summary

ReplaceMissingValuesWithZero()

Method Summary

weka.core.Capabilities	getCapabilities() Returns the Capabilities of this filter.
String	getRevision() Returns the revision string.
String	globalInfo() Returns a string describing this filter
boolean	input(weka.core.Instance instance) Input an instance for filtering.
static void	main(String[] argv) Main method for testing this class.
boolean	setInputFormat(weka.core.Instances instanceInfo) Sets the format of the input instances.

Methods inherited from class weka.filters.Filter

batchFilterFile, batchFinished, bufferInput, copyValues, copyValues, filterFile, flushInput, getCapabilities, getInputFormat, getOutputFormat, initInputLocators, initOutputLocators, inputFormatPeek, isFirstBatchDone, isNewBatch, isOutputFormatDefined, makeCopies, makeCopy, mayRemoveInstanceAfterFirstBatchDone, numPendingOutput, output, outputFormatPeek, outputPeek, push, resetQueue, runFilter, setOutputFormat, testInputFormat, toString, useFilter, wekaStaticWrapper

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

ReplaceMissingValuesWithZero

public ReplaceMissingValuesWithZero()

Method Detail

globalInfo

public String globalInfo()

Returns a string describing this filter

Returns:

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

getCapabilities

public weka.core.Capabilities getCapabilities()

Returns the Capabilities of this filter.

Specified by:

getCapabilities in interface weka.core.CapabilitiesHandler

Overrides:

getCapabilities in class weka.filters.Filter

Returns:

the capabilities of this object

See Also:

Capabilities

setInputFormat

public boolean setInputFormat(weka.core.Instances instanceInfo)
                       throws Exception

Sets the format of the input instances.

Overrides:

setInputFormat in class weka.filters.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:

Exception - if the input format can't be set successfully

input

public boolean input(weka.core.Instance instance)

Input an instance for filtering. Filter requires all training instances be read before producing output.

Overrides:

input in class weka.filters.Filter

Parameters:

instance - the input instance

Returns:

true if the filtered instance may now be collected with output().

Throws:

IllegalStateException - if no input format has been set.

getRevision

public String getRevision()

Returns the revision string.

Specified by:

getRevision in interface weka.core.RevisionHandler

Overrides:

getRevision in class weka.filters.Filter

Returns:

the revision

main

public static void main(String[] argv)

Main method for testing this class.

Parameters:

argv - should contain arguments to the filter: use -h for help