weka.filters.unsupervised.attribute

Class ReplaceMissingWithUserConstant

java.lang.Object

weka.filters.Filter

weka.filters.unsupervised.attribute.PotentialClassIgnorer

weka.filters.unsupervised.attribute.ReplaceMissingWithUserConstant

All Implemented Interfaces:

Serializable, CapabilitiesHandler, EnvironmentHandler, OptionHandler, RevisionHandler, StreamableFilter, UnsupervisedFilter

public class ReplaceMissingWithUserConstant
extends PotentialClassIgnorer
implements UnsupervisedFilter, StreamableFilter, EnvironmentHandler

Replaces all missing values for nominal, string, numeric and date attributes in the dataset with user-supplied constant values.

Version:

$Revision: 9197 $

Author:

Mark Hall (mhall{[at]}pentaho{[dot]}com)

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ReplaceMissingWithUserConstant()

Method Summary

Methods

Modifier and Type	Method and Description
String	attributesTipText() Tip text for this property suitable for displaying in the GUI.
String	dateFormatTipText() Tip text for this property suitable for displaying in the GUI.
String	dateReplacementValueTipText() Tip text for this property suitable for displaying in the GUI.
String	getAttributes() Get the list of attributes to consider for replacing missing values
Capabilities	getCapabilities() Returns the Capabilities of this filter.
String	getDateFormat() Get the date format to use for parsing the date replacement constant
String	getDateReplacementValue() Get the date replacement value
String	getNominalStringReplacementValue() Get the nominal/string replacement value
String	getNumericReplacementValue() Get the numeric replacement value
String[]	getOptions() Gets the current settings of the filter.
String	getRevision() Returns the revision string.
String	globalInfo() Returns a string describing this filter
boolean	input(Instance inst) Input an instance for filtering.
Enumeration	listOptions() Returns an enumeration describing the available options.
static void	main(String[] args) Main method for testing this class.
String	nominalStringReplacementValueTipText() Tip text for this property suitable for displaying in the GUI.
String	numericReplacementValueTipText() Tip text for this property suitable for displaying in the GUI.
void	setAttributes(String range) Set the list of attributes to consider for replacing missing values
void	setDateFormat(String dateFormat) Set the date format to use for parsing the date replacement constant
void	setDateReplacementValue(String dateConstant) Set the date replacement value
void	setEnvironment(Environment env) Set environment variables to use.
boolean	setInputFormat(Instances instanceInfo) Sets the format of the input instances.
void	setNominalStringReplacementValue(String nominalStringConstant) Set the nominal/string replacement value
void	setNumericReplacementValue(String numericConstant) Set the numeric replacement value
void	setOptions(String[] options) Parses a given list of options.

Methods inherited from class weka.filters.unsupervised.attribute.PotentialClassIgnorer

getIgnoreClass, getOutputFormat, ignoreClassTipText, setIgnoreClass

Methods inherited from class weka.filters.Filter

batchFilterFile, batchFinished, filterFile, getCapabilities, isFirstBatchDone, isNewBatch, isOutputFormatDefined, makeCopies, makeCopy, mayRemoveInstanceAfterFirstBatchDone, numPendingOutput, output, outputPeek, runFilter, toString, useFilter, wekaStaticWrapper

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

ReplaceMissingWithUserConstant

public ReplaceMissingWithUserConstant()

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 Capabilities getCapabilities()

Description copied from class: Filter

Returns the Capabilities of this filter. Derived filters have to override this method to enable capabilities.

Specified by:

getCapabilities in interface CapabilitiesHandler

Overrides:

getCapabilities in class Filter

Returns:

the capabilities of this object

See Also:

Capabilities

listOptions

public Enumeration listOptions()

Description copied from class: PotentialClassIgnorer

Returns an enumeration describing the available options.

Specified by:

listOptions in interface OptionHandler

Overrides:

listOptions in class PotentialClassIgnorer

Returns:

an enumeration of all the available options.

setOptions

public void setOptions(String[] options)
                throws Exception

Parses a given list of options.

Valid options are:

 -A <index1,index2-index4,... | att-name1,att-name2,...>
  Specify list of attributes to replace missing values for 
  (as weka range list of indices or a comma separated list of attribute names).
  (default: consider all attributes)

 -N
  Specify the replacement constant for nominal/string attributes

 -R
  Specify the replacement constant for numeric attributes
  (default: 0)

 -D
  Specify the replacement constant for date attributes

 -F
  Specify the date format for parsing the replacement date constant
  (default: yyyy-MM-dd'T'HH:mm:ss)

 -unset-class-temporarily
  Unsets the class index temporarily before the filter is
  applied to the data.
  (default: no)

Specified by:

setOptions in interface OptionHandler

Overrides:

setOptions in class PotentialClassIgnorer

Parameters:

options - the list of options as an array of strings

Throws:

Exception - if an option is not supported

getOptions

public String[] getOptions()

Description copied from class: PotentialClassIgnorer

Gets the current settings of the filter.

Specified by:

getOptions in interface OptionHandler

Overrides:

getOptions in class PotentialClassIgnorer

Returns:

an array of strings suitable for passing to setOptions

attributesTipText

public String attributesTipText()

Tip text for this property suitable for displaying in the GUI.

Returns:

the tip text for this property.

setAttributes

public void setAttributes(String range)

Set the list of attributes to consider for replacing missing values

Parameters:

range - the list of attributes to consider

getAttributes

public String getAttributes()

Get the list of attributes to consider for replacing missing values

Returns:

the list of attributes to consider

nominalStringReplacementValueTipText

public String nominalStringReplacementValueTipText()

Tip text for this property suitable for displaying in the GUI.

Returns:

the tip text for this property.

getNominalStringReplacementValue

public String getNominalStringReplacementValue()

Get the nominal/string replacement value

Returns:

the nominal/string replacement value

setNominalStringReplacementValue

public void setNominalStringReplacementValue(String nominalStringConstant)

Set the nominal/string replacement value

Parameters:

m_nominalStringConstant - the nominal/string constant to use

numericReplacementValueTipText

public String numericReplacementValueTipText()

Tip text for this property suitable for displaying in the GUI.

Returns:

the tip text for this property.

getNumericReplacementValue

public String getNumericReplacementValue()

Get the numeric replacement value

Returns:

the numeric replacement value

setNumericReplacementValue

public void setNumericReplacementValue(String numericConstant)

Set the numeric replacement value

Parameters:

numericConstant - the numeric replacement value

dateReplacementValueTipText

public String dateReplacementValueTipText()

Tip text for this property suitable for displaying in the GUI.

Returns:

the tip text for this property.

setDateReplacementValue

public void setDateReplacementValue(String dateConstant)

Set the date replacement value

Parameters:

dateConstant - the date replacement value

getDateReplacementValue

public String getDateReplacementValue()

Get the date replacement value

Returns:

the date replacement value

dateFormatTipText

public String dateFormatTipText()

Tip text for this property suitable for displaying in the GUI.

Returns:

the tip text for this property.

setDateFormat

public void setDateFormat(String dateFormat)

Set the date format to use for parsing the date replacement constant

Parameters:

dateFormat - the date format to use

getDateFormat

public String getDateFormat()

Get the date format to use for parsing the date replacement constant

Returns:

the date format to use

setInputFormat

public boolean setInputFormat(Instances instanceInfo)
                       throws Exception

Description copied from class: PotentialClassIgnorer

Sets the format of the input instances. If the filter is able to determine the output format before seeing any input instances, it does so here. This default implementation clears the output format and output queue, and the new batch flag is set. Overriders should call super.setInputFormat(Instances)

Overrides:

setInputFormat in class PotentialClassIgnorer

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 inputFormat can't be set successfully

input

public boolean input(Instance inst)
              throws Exception

Description copied from class: Filter

Input an instance for filtering. Ordinarily the instance is processed and made available for output immediately. Some filters require all instances be read before producing output, in which case output instances should be collected after calling batchFinished(). If the input marks the start of a new batch, the output queue is cleared. This default implementation assumes all instance conversion will occur when batchFinished() is called.

Overrides:

input in class Filter

Parameters:

inst - the input instance

Returns:

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

Throws:

NullPointerException - if the input format has not been defined.

Exception - if the input instance was not of the correct format or if there was a problem with the filtering.

setEnvironment

public void setEnvironment(Environment env)

Description copied from interface: EnvironmentHandler

Set environment variables to use.

Specified by:

setEnvironment in interface EnvironmentHandler

Parameters:

env - the environment variables to use

getRevision

public 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(String[] args)

Main method for testing this class.

Parameters:

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