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Class weka.filters.MergeTwoValuesFilter

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

public class MergeTwoValuesFilter
extends Filter
implements OptionHandler
Merges two values of a nominal attribute.

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: 1.9 $
Author:
Eibe Frank (eibe@cs.waikato.ac.nz)

Constructor Index

 o MergeTwoValuesFilter()
 

Method Index

 o getAttributeIndex()
Get the index of the attribute used.
 o getFirstValueIndex()
Get the index of the first value used.
 o getOptions()
Gets the current settings of the filter.
 o getSecondValueIndex()
Get the index of the second value used.
 o input(Instance)
Input an instance for filtering.
 o listOptions()
Returns an enumeration describing the available options
 o main(String[])
Main method for testing this class.
 o setAttributeIndex(int)
Sets index of the attribute used.
 o setFirstValueIndex(int)
Sets index of the first value used.
 o setInputFormat(Instances)
Sets the format of the input instances.
 o setOptions(String[])
Parses the options for this object.
 o setSecondValueIndex(int)
Sets index of the second value used.

Constructor Detail

 o MergeTwoValuesFilter
public MergeTwoValuesFilter()

Method Detail

 o setInputFormat
public boolean setInputFormat(Instances instanceInfo) throws java.lang.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:
java.lang.Exception - if the input format can't be set successfully
Overrides:
setInputFormat in class Filter
 o input
public boolean input(Instance instance)
          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:
java.lang.IllegalStateException - if no input format has been set.
Overrides:
input in class Filter
 o listOptions
public java.util.Enumeration listOptions()
          Returns an enumeration describing the available options
Returns:
an enumeration of all the available options
 o setOptions
public void setOptions(java.lang.String options[]) throws java.lang.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:
java.lang.Exception - if an option is not supported
 o getOptions
public java.lang.String[] getOptions()
          Gets the current settings of the filter.
Returns:
an array of strings suitable for passing to setOptions
 o getAttributeIndex
public int getAttributeIndex()
          Get the index of the attribute used.
Returns:
the index of the attribute
 o setAttributeIndex
public void setAttributeIndex(int attIndex)
          Sets index of the attribute used.
Parameters:
index - the index of the attribute
 o getFirstValueIndex
public int getFirstValueIndex()
          Get the index of the first value used.
Returns:
the index of the first value
 o setFirstValueIndex
public void setFirstValueIndex(int firstIndex)
          Sets index of the first value used.
Parameters:
index - the index of the first value
 o getSecondValueIndex
public int getSecondValueIndex()
          Get the index of the second value used.
Returns:
the index of the second value
 o setSecondValueIndex
public void setSecondValueIndex(int secondIndex)
          Sets index of the second value used.
Parameters:
index - the index of the second value
 o 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

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