weka.filters
Class MakeIndicatorFilter

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

All Implemented Interfaces:

OptionHandler, java.io.Serializable

public class MakeIndicatorFilter

extends Filter

implements OptionHandler

Creates a new dataset with a boolean attribute replacing a nominal attribute. In the new dataset, a value of 1 is assigned to an instance that exhibits a particular range of attribute values, a 0 to an instance that doesn't. The boolean attribute is coded as numeric by default.

Valid filter-specific options are:

-C col
Index of the attribute to be changed. (default "last")

-V index1,index2-index4,...
Specify list of values to indicate. First and last are valid indices. (default "last")

-N
Set if new boolean attribute nominal.

Author:

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

See Also:

Serialized Form

Fields inherited from class weka.filters.Filter

m_NewBatch

Constructor Summary

MakeIndicatorFilter()

Method Summary

java.lang.String	attributeIndexTipText()
int	getAttributeIndex() Get the index of the attribute used.
boolean	getNumeric() Check if new attribute is to be numeric.
java.lang.String[]	getOptions() Gets the current settings of the filter.
java.lang.String	getValueIndices() Get the indices of the indicator values.
Range	getValueRange() Get the range containing the indicator values.
java.lang.String	globalInfo()
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.
java.lang.String	numericTipText()
void	setAttributeIndex(int attIndex) Sets index of of the attribute used.
boolean	setInputFormat(Instances instanceInfo) Sets the format of the input instances.
void	setNumeric(boolean bool) Sets if the new Attribute is to be numeric.
void	setOptions(java.lang.String[] options) Parses the options for this object.
void	setValueIndex(int index) Sets index of the indicator value.
void	setValueIndices(java.lang.String range) Sets indices of the indicator values.
void	setValueIndicesArray(int[] indices) Set which attributes are to be deleted (or kept if invert is true)
java.lang.String	valueIndicesTipText()

Methods inherited from class weka.filters.Filter

batchFilterFile, batchFinished, bufferInput, copyStringValues, copyStringValues, filterFile, flushInput, getInputFormat, getInputStringIndex, getOutputFormat, getOutputStringIndex, getStringIndices, inputFormat, isOutputFormatDefined, numPendingOutput, output, outputFormat, outputFormatPeek, outputPeek, push, resetQueue, setOutputFormat, useFilter

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MakeIndicatorFilter

public MakeIndicatorFilter()

Method Detail

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:

UnsupportedAttributeTypeException - the selecte attribute is not nominal

UnsupportedAttributeTypeException - the selecte attribute has fewer than two values.

input

public boolean input(Instance instance)

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

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.IllegalStateException - if no input format has been set.

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 the options for this object. Valid options are:

-C col
Index of the attribute to be changed.

-V index1,index2-index4,...
Specify list of values to indicate. First and last are valid indices. (default "last")

-N
Set if new boolean attribute nominal.

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

globalInfo

public java.lang.String globalInfo()

Returns:

a description of the filter suitable for displaying in the explorer/experimenter gui

attributeIndexTipText

public java.lang.String attributeIndexTipText()

Returns:

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

getAttributeIndex

public int getAttributeIndex()

Get the index of the attribute used.

Returns:

the index of the attribute

setAttributeIndex

public void setAttributeIndex(int attIndex)

Sets index of of the attribute used.

Parameters:

index - the index of the attribute

getValueRange

public Range getValueRange()

Get the range containing the indicator values.

Returns:

the range containing the indicator values

valueIndicesTipText

public java.lang.String valueIndicesTipText()

Returns:

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

getValueIndices

public java.lang.String getValueIndices()

Get the indices of the indicator values.

Returns:

the indices of the indicator values

setValueIndices

public void setValueIndices(java.lang.String range)

Sets indices of the indicator values.

Parameters:

range - the string representation of the indicator value indices

See Also:

Range

setValueIndex

public void setValueIndex(int index)

Sets index of the indicator value.

Parameters:

index - the index of the indicator value

setValueIndicesArray

public void setValueIndicesArray(int[] indices)

Set which attributes are to be deleted (or kept if invert is true)

Parameters:

attributes - an array containing indexes of attributes to select. Since the array will typically come from a program, attributes are indexed from 0.

Throws:

InvalidArgumentException - if an invalid set of ranges is supplied

numericTipText

public java.lang.String numericTipText()

Returns:

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

setNumeric

public void setNumeric(boolean bool)

Sets if the new Attribute is to be numeric.

Parameters:

bool - true if new Attribute is to be numeric

getNumeric

public boolean getNumeric()

Check if new attribute is to be numeric.

Returns:

true if new attribute is to be numeric

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