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Class weka.filters.MergeTwoValuesFilter

java.lang.Object
   |
   +----weka.filters.Filter
           |
           +----weka.filters.MergeTwoValuesFilter

public class MergeTwoValuesFilter

extends Filter

implements OptionHandler

Valid filter-specific options are:

-C col
The column containing the values to be merged. (default last)

-F index
Index of the first value (default first).

-S index
Index of the second value (default last).

Version:

$Revision: 1.4 $

Author:

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

MergeTwoValuesFilter()

getAttributeIndex()

Get the index of the attribute used.

getFirstValueIndex()

Get the index of the first value used.

getOptions()

Gets the current settings of the filter.

getSecondValueIndex()

Get the index of the second value used.

input(Instance)

Input an instance for filtering.

inputFormat(Instances)

Sets the format of the input instances.

listOptions()

Returns an enumeration describing the available options

main(String[])

Main method for testing this class.

setAttributeIndex(int)

Sets index of the attribute used.

setFirstValueIndex(int)

Sets index of the first value used.

setOptions(String[])

Parses the options for this object.

setSecondValueIndex(int)

Sets index of the second value used.

 public MergeTwoValuesFilter()

 public boolean inputFormat(Instances instanceInfo) throws Exception

Sets the format of the input instances.

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

Overrides:

inputFormat in class Filter

 public boolean input(Instance instance) throws Exception

Input an instance for filtering. The instance is processed and made available for output immediately.

Parameters:

instance - the input instance

Returns:

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

Throws: Exception

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

Overrides:

input in class Filter

 public Enumeration listOptions()

Returns an enumeration describing the available options

Returns:

an enumeration of all the available options

 public void setOptions(String options[]) throws Exception

Parses the options for this object. Valid options are:

-C col
The column containing the values to be merged. (default last)

-F index
Index of the first value (default first).

-S index
Index of the second value (default last).

Parameters:

options - the list of options as an array of strings

Throws: Exception

if an option is not supported

 public String[] getOptions()

Gets the current settings of the filter.

Returns:

an array of strings suitable for passing to setOptions

 public int getAttributeIndex()

Get the index of the attribute used.

Returns:

the index of the attribute

 public void setAttributeIndex(int attIndex)

Sets index of the attribute used.

Parameters:

index - the index of the attribute

 public int getFirstValueIndex()

Get the index of the first value used.

Returns:

the index of the first value

 public void setFirstValueIndex(int firstIndex)

Sets index of the first value used.

Parameters:

index - the index of the first value

 public int getSecondValueIndex()

Get the index of the second value used.

Returns:

the index of the second value

 public void setSecondValueIndex(int secondIndex)

Sets index of the second value used.

Parameters:

index - the index of the second value

 public static void main(String argv[])

Main method for testing this class.

Parameters:

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

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