Class NumericToNominal
java.lang.Object
weka.filters.Filter
weka.filters.SimpleFilter
weka.filters.SimpleBatchFilter
weka.filters.unsupervised.attribute.NumericToNominal
- All Implemented Interfaces:
Serializable,CapabilitiesHandler,CapabilitiesIgnorer,CommandlineRunnable,OptionHandler,RevisionHandler,WeightedAttributesHandler,WeightedInstancesHandler
public class NumericToNominal
extends SimpleBatchFilter
implements WeightedInstancesHandler, WeightedAttributesHandler
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 force 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: 14534 $
- Author:
- fracpete (fracpete at waikato dot ac dot nz)
- See Also:
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionReturns the tip text for this propertyGets the current range selectionReturns the Capabilities of this filter.booleanGets whether the supplied columns are to be worked on or the others.String[]Gets the current settings of the filter.Returns the revision string.Returns a string describing this filterReturns the tip text for this propertyGets an enumeration describing the available options.static voidRuns the filter with the given parameters.voidsetAttributeIndices(String value) Sets which attributes are to be "nominalized" (only numeric attributes among the selection will be transformed).voidsetAttributeIndicesArray(int[] value) Sets which attributes are to be transoformed to nominal.voidsetInvertSelection(boolean value) Sets whether selected columns should be worked on or all the others apart from these.voidsetOptions(String[] options) Parses a given list of options.Methods inherited from class weka.filters.SimpleBatchFilter
allowAccessToFullInputFormat, batchFinished, input, inputMethods inherited from class weka.filters.SimpleFilter
setInputFormatMethods inherited from class weka.filters.Filter
batchFilterFile, debugTipText, doNotCheckCapabilitiesTipText, filterFile, getCapabilities, getCopyOfInputFormat, getDebug, getDoNotCheckCapabilities, getOutputFormat, isFirstBatchDone, isNewBatch, isOutputFormatDefined, makeCopies, makeCopy, mayRemoveInstanceAfterFirstBatchDone, numPendingOutput, output, outputPeek, postExecution, preExecution, run, runFilter, setDebug, setDoNotCheckCapabilities, toString, useFilter, wekaStaticWrapper
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Constructor Details
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NumericToNominal
public NumericToNominal()
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Method Details
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globalInfo
Returns a string describing this filter- Specified by:
globalInfoin classSimpleFilter- Returns:
- a description of the filter suitable for displaying in the explorer/experimenter gui
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listOptions
Gets an enumeration describing the available options.- Specified by:
listOptionsin interfaceOptionHandler- Overrides:
listOptionsin classFilter- Returns:
- an enumeration of all the available options.
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setOptions
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:
setOptionsin interfaceOptionHandler- Overrides:
setOptionsin classFilter- 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:
getOptionsin interfaceOptionHandler- Overrides:
getOptionsin classFilter- Returns:
- an array of strings suitable for passing to setOptions
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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 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
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 "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:
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:
IllegalArgumentException- if an invalid set of ranges is supplied
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getCapabilities
Returns the Capabilities of this filter.- Specified by:
getCapabilitiesin interfaceCapabilitiesHandler- Overrides:
getCapabilitiesin classFilter- Returns:
- the capabilities of this object
- See Also:
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getRevision
Returns the revision string.- Specified by:
getRevisionin interfaceRevisionHandler- Overrides:
getRevisionin classFilter- Returns:
- the revision
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main
Runs the filter with the given parameters. Use -h to list options.- Parameters:
args- the commandline options
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