Class NominalToBinary
java.lang.Object
weka.filters.Filter
weka.filters.unsupervised.attribute.NominalToBinary
- All Implemented Interfaces:
Serializable
,CapabilitiesHandler
,OptionHandler
,RevisionHandler
,StreamableFilter
,UnsupervisedFilter
public class NominalToBinary
extends Filter
implements UnsupervisedFilter, OptionHandler, StreamableFilter
Converts all nominal attributes into binary numeric attributes. An attribute with k values is transformed into k binary attributes if the class is nominal (using the one-attribute-per-value approach). Binary attributes are left binary, if option '-A' is not given.If the class is numeric, you might want to use the supervised version of this filter.
Valid options are:
-N Sets if binary attributes are to be coded as nominal ones.
-A For each nominal value a new attribute is created, not only if there are more than 2 values.
-R <col1,col2-col4,...> Specifies list of columns to act on. First and last are valid indexes. (default: first-last)
-V Invert matching sense of column indexes.
- Version:
- $Revision: 9819 $
- Author:
- Eibe Frank (eibe@cs.waikato.ac.nz)
- See Also:
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionReturns the tip text for this propertyReturns the tip text for this propertyGets the current range selectionboolean
Gets if binary attributes are to be treated as nominal ones.Returns the Capabilities of this filter.boolean
Gets whether the supplied columns are to be removed or keptString[]
Gets the current settings of the filter.Returns the revision string.boolean
Gets if all nominal values are turned into new attributes, not only if there are more than 2.Returns a string describing this filterboolean
Input an instance for filtering.Returns the tip text for this propertyReturns an enumeration describing the available options.static void
Main method for testing this class.void
setAttributeIndices
(String rangeList) Sets which attributes are to be acted on.void
setBinaryAttributesNominal
(boolean bool) Sets if binary attributes are to be treates as nominal ones.boolean
setInputFormat
(Instances instanceInfo) Sets the format of the input instances.void
setInvertSelection
(boolean invert) Sets whether selected columns should be removed or kept.void
setOptions
(String[] options) Parses a given list of options.void
setTransformAllValues
(boolean bool) Sets whether all nominal values are transformed into new attributes, not just if there are more than 2.Returns the tip text for this propertyMethods inherited from class weka.filters.Filter
batchFilterFile, batchFinished, filterFile, getCapabilities, getOutputFormat, isFirstBatchDone, isNewBatch, isOutputFormatDefined, makeCopies, makeCopy, numPendingOutput, output, outputPeek, toString, useFilter, wekaStaticWrapper
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Constructor Details
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NominalToBinary
public NominalToBinary()Constructor - initialises the filter
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Method Details
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globalInfo
Returns a string describing this filter- Returns:
- a description of the filter suitable for displaying in the explorer/experimenter gui
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getCapabilities
Returns the Capabilities of this filter.- Specified by:
getCapabilities
in interfaceCapabilitiesHandler
- Overrides:
getCapabilities
in classFilter
- Returns:
- the capabilities of this object
- See Also:
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setInputFormat
Sets the format of the input instances.- Overrides:
setInputFormat
in classFilter
- 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
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input
Input an instance for filtering. Filter requires all training instances be read before producing output.- Overrides:
input
in classFilter
- Parameters:
instance
- the input instance- Returns:
- true if the filtered instance may now be collected with output().
- Throws:
IllegalStateException
- if no input format has been set
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listOptions
Returns an enumeration describing the available options.- Specified by:
listOptions
in interfaceOptionHandler
- Returns:
- an enumeration of all the available options.
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setOptions
Parses a given list of options. Valid options are:-N Sets if binary attributes are to be coded as nominal ones.
-A For each nominal value a new attribute is created, not only if there are more than 2 values.
-R <col1,col2-col4,...> Specifies list of columns to act on. First and last are valid indexes. (default: first-last)
-V Invert matching sense of column indexes.
- Specified by:
setOptions
in interfaceOptionHandler
- Parameters:
options
- the list of options as an array of strings- Throws:
Exception
- if an option is not supported
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getOptions
Gets the current settings of the filter.- Specified by:
getOptions
in interfaceOptionHandler
- Returns:
- an array of strings suitable for passing to setOptions
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binaryAttributesNominalTipText
Returns the tip text for this property- Returns:
- tip text for this property suitable for displaying in the explorer/experimenter gui
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getBinaryAttributesNominal
public boolean getBinaryAttributesNominal()Gets if binary attributes are to be treated as nominal ones.- Returns:
- true if binary attributes are to be treated as nominal ones
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setBinaryAttributesNominal
public void setBinaryAttributesNominal(boolean bool) Sets if binary attributes are to be treates as nominal ones.- Parameters:
bool
- true if binary attributes are to be treated as nominal ones
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transformAllValuesTipText
Returns the tip text for this property- Returns:
- tip text for this property suitable for displaying in the explorer/experimenter gui
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getTransformAllValues
public boolean getTransformAllValues()Gets if all nominal values are turned into new attributes, not only if there are more than 2.- Returns:
- true all nominal values are transformed into new attributes
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setTransformAllValues
public void setTransformAllValues(boolean bool) Sets whether all nominal values are transformed into new attributes, not just if there are more than 2.- Parameters:
bool
- true if all nominal value are transformed into new attributes
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invertSelectionTipText
Returns the tip text for this property- Returns:
- tip text for this property suitable for displaying in the explorer/experimenter gui
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getInvertSelection
public boolean getInvertSelection()Gets whether the supplied columns are to be removed or kept- Returns:
- true if the supplied columns will be kept
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setInvertSelection
public void setInvertSelection(boolean invert) Sets whether selected columns should be removed or kept. If true the selected columns are kept and unselected columns are deleted. If false selected columns are deleted and unselected columns are kept.- Parameters:
invert
- the new invert setting
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attributeIndicesTipText
Returns the tip text for this property- Returns:
- tip text for this property suitable for displaying in the explorer/experimenter gui
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getAttributeIndices
Gets the current range selection- Returns:
- a string containing a comma separated list of ranges
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setAttributeIndices
Sets which attributes are to be acted on.- Parameters:
rangeList
- a string representing the list of attributes. Since the string will typically come from a user, attributes are indexed from 1.
eg: first-3,5,6-last- Throws:
IllegalArgumentException
- if an invalid range list is supplied
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getRevision
Returns the revision string.- Specified by:
getRevision
in interfaceRevisionHandler
- Overrides:
getRevision
in classFilter
- Returns:
- the revision
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main
Main method for testing this class.- Parameters:
argv
- should contain arguments to the filter: use -h for help
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