weka.filters.unsupervised.attribute

Class ChangeDateFormat

java.lang.Object

weka.filters.Filter

weka.filters.unsupervised.attribute.ChangeDateFormat

All Implemented Interfaces:

Serializable, CapabilitiesHandler, OptionHandler, RevisionHandler, StreamableFilter, UnsupervisedFilter

public class ChangeDateFormat
extends Filter
implements UnsupervisedFilter, StreamableFilter, OptionHandler

Changes the date format used by a date attribute. This is most useful for converting to a format with less precision, for example, from an absolute date to day of year, etc. This changes the format string, and changes the date values to those that would be parsed by the new format.

Valid options are:

 -C <col>
  Sets the attribute index (default last).

 -F <value index>
  Sets the output date format string (default corresponds to ISO-8601).

Version:

$Revision: 8034 $

Author:

Len Trigg

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ChangeDateFormat()

Method Summary

Methods

Modifier and Type	Method and Description
String	attributeIndexTipText()
String	dateFormatTipText()
String	getAttributeIndex() Gets the index of the attribute converted.
Capabilities	getCapabilities() Returns the Capabilities of this filter.
SimpleDateFormat	getDateFormat() Get the date format used in output.
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 instance) Input an instance for filtering.
Enumeration	listOptions() Returns an enumeration describing the available options
static void	main(String[] argv) Main method for testing this class.
void	setAttributeIndex(String attIndex) Sets the index of the attribute used.
void	setDateFormat(SimpleDateFormat dateFormat) Sets the output date format.
void	setDateFormat(String dateFormat) Sets the output date format.
boolean	setInputFormat(Instances instanceInfo) Sets the format of the input instances.
void	setOptions(String[] options) Parses a given list of options.

Methods inherited from class weka.filters.Filter

batchFilterFile, batchFinished, filterFile, getCapabilities, getOutputFormat, 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

ChangeDateFormat

public ChangeDateFormat()

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()

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 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:

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

input

public boolean input(Instance instance)
              throws Exception

Input an instance for filtering.

Overrides:

input in class Filter

Parameters:

instance - the input instance

Returns:

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

Throws:

Exception - if the input format was not set or the date format cannot be parsed

listOptions

public 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(String[] options)
                throws Exception

Parses a given list of options.

Valid options are:

 -C <col>
  Sets the attribute index (default last).

 -F <value index>
  Sets the output date format string (default corresponds to ISO-8601).

Specified by:

setOptions in interface OptionHandler

Parameters:

options - the list of options as an array of strings

Throws:

Exception - if an option is not supported

getOptions

public 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

attributeIndexTipText

public String attributeIndexTipText()

Returns:

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

getAttributeIndex

public String getAttributeIndex()

Gets the index of the attribute converted.

Returns:

the index of the attribute

setAttributeIndex

public void setAttributeIndex(String attIndex)

Sets the index of the attribute used.

Parameters:

attIndex - the index of the attribute

dateFormatTipText

public String dateFormatTipText()

Returns:

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

getDateFormat

public SimpleDateFormat getDateFormat()

Get the date format used in output.

Returns:

the output date format.

setDateFormat

public void setDateFormat(String dateFormat)

Sets the output date format.

Parameters:

dateFormat - the output date format.

setDateFormat

public void setDateFormat(SimpleDateFormat dateFormat)

Sets the output date format.

Parameters:

dateFormat - the output date format.

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[] argv)

Main method for testing this class.

Parameters:

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