java.lang.Object
- weka.filters.Filter
- - weka.filters.unsupervised.attribute.ChangeDateFormat

All Implemented Interfaces:

java.io.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: 5543 $

Author:

Len Trigg

See Also:

Serialized Form

Constructor Summary

Constructors
Constructor Description

ChangeDateFormat()

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`java.lang.String`	`attributeIndexTipText()`
`java.lang.String`	`dateFormatTipText()`
`java.lang.String`	`getAttributeIndex()`	Gets the index of the attribute converted.
`Capabilities`	`getCapabilities()`	Returns the Capabilities of this filter.
`java.text.SimpleDateFormat`	`getDateFormat()`	Get the date format used in output.
`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
`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[] argv)`	Main method for testing this class.
`void`	`setAttributeIndex(java.lang.String attIndex)`	Sets the index of the attribute used.
`void`	`setDateFormat(java.lang.String dateFormat)`	Sets the output date format.
`void`	`setDateFormat(java.text.SimpleDateFormat dateFormat)`	Sets the output date format.
`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, batchFinished, 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
  - ChangeDateFormat
```
public ChangeDateFormat()
```
- 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
  - 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 input format can't be set successfully
  - input
```
public boolean input(Instance instance)
              throws java.lang.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:
    
    java.lang.Exception - if the input format was not set or the date format cannot be parsed
  - 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 <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:
    
    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
  - attributeIndexTipText
```
public java.lang.String attributeIndexTipText()
```
    Returns:
    
    tip text for this property suitable for displaying in the explorer/experimenter gui
  - getAttributeIndex
```
public java.lang.String getAttributeIndex()
```
    Gets the index of the attribute converted.
    
    Returns:
    
    the index of the attribute
  - setAttributeIndex
```
public void setAttributeIndex(java.lang.String attIndex)
```
    Sets the index of the attribute used.
    
    Parameters:
    
    attIndex - the index of the attribute
  - dateFormatTipText
```
public java.lang.String dateFormatTipText()
```
    Returns:
    
    tip text for this property suitable for displaying in the explorer/experimenter gui
  - getDateFormat
```
public java.text.SimpleDateFormat getDateFormat()
```
    Get the date format used in output.
    
    Returns:
    
    the output date format.
  - setDateFormat
```
public void setDateFormat(java.lang.String dateFormat)
```
    Sets the output date format.
    
    Parameters:
    
    dateFormat - the output date format.
  - setDateFormat
```
public void setDateFormat(java.text.SimpleDateFormat dateFormat)
```
    Sets the output date format.
    
    Parameters:
    
    dateFormat - the output date format.
  - 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[] argv)
```
    Main method for testing this class.
    
    Parameters:
    
    argv - should contain arguments to the filter: use -h for help

Class ChangeDateFormat

Constructor Summary

Method Summary

Methods inherited from class weka.filters.Filter

Methods inherited from class java.lang.Object

Constructor Detail

ChangeDateFormat

Method Detail

globalInfo

getCapabilities

setInputFormat

input

listOptions

setOptions

getOptions

attributeIndexTipText

getAttributeIndex

setAttributeIndex

dateFormatTipText

getDateFormat

setDateFormat

setDateFormat

getRevision

main