Class NumericToNominal
- java.lang.Object
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- weka.filters.Filter
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- weka.filters.SimpleFilter
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- weka.filters.SimpleBatchFilter
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- weka.filters.unsupervised.attribute.NumericToNominal
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- All Implemented Interfaces:
java.io.Serializable
,CapabilitiesHandler
,OptionHandler
,RevisionHandler
public class NumericToNominal extends SimpleBatchFilter
A filter for turning numeric attributes into nominal ones. Unlike discretization, it just takes all numeric values and adds them to the list of nominal values of that attribute. Useful after CSV imports, to enforce certain attributes to become nominal, e.g., the class attribute, containing values from 1 to 5. Valid options are:-R <col1,col2-col4,...> Specifies list of columns to Discretize. First and last are valid indexes. (default: first-last)
-V Invert matching sense of column indexes.
- Version:
- $Revision: 10988 $
- Author:
- fracpete (fracpete at waikato dot ac dot nz)
- See Also:
- Serialized Form
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Constructor Summary
Constructors Constructor Description NumericToNominal()
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description java.lang.String
attributeIndicesTipText()
Returns the tip text for this propertyjava.lang.String
getAttributeIndices()
Gets the current range selectionCapabilities
getCapabilities()
Returns the Capabilities of this filter.boolean
getInvertSelection()
Gets whether the supplied columns are to be worked on or the others.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 filterjava.lang.String
invertSelectionTipText()
Returns the tip text for this propertyjava.util.Enumeration
listOptions()
Gets an enumeration describing the available options.static void
main(java.lang.String[] args)
Runs the filter with the given parameters.void
setAttributeIndices(java.lang.String value)
Sets which attributes are to be "nominalized" (only numeric attributes among the selection will be transformed).void
setAttributeIndicesArray(int[] value)
Sets which attributes are to be transoformed to nominal.void
setInvertSelection(boolean value)
Sets whether selected columns should be worked on or all the others apart from these.void
setOptions(java.lang.String[] options)
Parses a given list of options.-
Methods inherited from class weka.filters.SimpleBatchFilter
batchFinished, input
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Methods inherited from class weka.filters.SimpleFilter
debugTipText, getDebug, setDebug, setInputFormat
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Methods inherited from class weka.filters.Filter
batchFilterFile, filterFile, getCapabilities, getOutputFormat, isFirstBatchDone, isNewBatch, isOutputFormatDefined, makeCopies, makeCopy, numPendingOutput, output, outputPeek, toString, useFilter, wekaStaticWrapper
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Method Detail
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globalInfo
public java.lang.String globalInfo()
Returns a string describing this filter- Specified by:
globalInfo
in classSimpleFilter
- Returns:
- a description of the filter suitable for displaying in the explorer/experimenter gui
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listOptions
public java.util.Enumeration listOptions()
Gets an enumeration describing the available options.- Specified by:
listOptions
in interfaceOptionHandler
- Overrides:
listOptions
in classSimpleFilter
- Returns:
- an enumeration of all the available options.
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setOptions
public void setOptions(java.lang.String[] options) throws java.lang.Exception
Parses a given list of options. Valid options are:-R <col1,col2-col4,...> Specifies list of columns to Discretize. First and last are valid indexes. (default: first-last)
-V Invert matching sense of column indexes.
- Specified by:
setOptions
in interfaceOptionHandler
- Overrides:
setOptions
in classSimpleFilter
- Parameters:
options
- the list of options as an array of strings- Throws:
java.lang.Exception
- if an option is not supported- See Also:
SimpleFilter.reset()
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getOptions
public java.lang.String[] getOptions()
Gets the current settings of the filter.- Specified by:
getOptions
in interfaceOptionHandler
- Overrides:
getOptions
in classSimpleFilter
- Returns:
- an array of strings suitable for passing to setOptions
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invertSelectionTipText
public java.lang.String 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 worked on or the others.- Returns:
- true if the supplied columns will be worked on
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setInvertSelection
public void setInvertSelection(boolean value)
Sets whether selected columns should be worked on or all the others apart from these. If true all the other columns are considered for "nominalization".- Parameters:
value
- the new invert setting
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attributeIndicesTipText
public java.lang.String 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
public java.lang.String getAttributeIndices()
Gets the current range selection- Returns:
- a string containing a comma separated list of ranges
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setAttributeIndices
public void setAttributeIndices(java.lang.String value)
Sets which attributes are to be "nominalized" (only numeric attributes among the selection will be transformed).- Parameters:
value
- 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:
java.lang.IllegalArgumentException
- if an invalid range list is supplied
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setAttributeIndicesArray
public void setAttributeIndicesArray(int[] value)
Sets which attributes are to be transoformed to nominal. (only numeric attributes among the selection will be transformed).- Parameters:
value
- an array containing indexes of attributes to nominalize. Since the array will typically come from a program, attributes are indexed from 0.- Throws:
java.lang.IllegalArgumentException
- if an invalid set of ranges is supplied
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getCapabilities
public Capabilities getCapabilities()
Returns the Capabilities of this filter.- Specified by:
getCapabilities
in interfaceCapabilitiesHandler
- Overrides:
getCapabilities
in classFilter
- Returns:
- the capabilities of this object
- See Also:
Capabilities
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getRevision
public java.lang.String getRevision()
Returns the revision string.- Specified by:
getRevision
in interfaceRevisionHandler
- Overrides:
getRevision
in classFilter
- Returns:
- the revision
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main
public static void main(java.lang.String[] args)
Runs the filter with the given parameters. Use -h to list options.- Parameters:
args
- the commandline options
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