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java.lang.Objectweka.filters.Filter
weka.filters.unsupervised.attribute.NominalToBinary
public class NominalToBinary
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.
Constructor Summary | |
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NominalToBinary()
Constructor - initialises the filter |
Method Summary | |
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java.lang.String |
attributeIndicesTipText()
Returns the tip text for this property |
java.lang.String |
binaryAttributesNominalTipText()
Returns the tip text for this property |
java.lang.String |
getAttributeIndices()
Gets the current range selection |
boolean |
getBinaryAttributesNominal()
Gets if binary attributes are to be treated as nominal ones. |
Capabilities |
getCapabilities()
Returns the Capabilities of this filter. |
boolean |
getInvertSelection()
Gets whether the supplied columns are to be removed or kept |
java.lang.String[] |
getOptions()
Gets the current settings of the filter. |
boolean |
getTransformAllValues()
Gets if all nominal values are turned into new attributes, not only if there are more than 2. |
java.lang.String |
globalInfo()
Returns a string describing this filter |
boolean |
input(Instance instance)
Input an instance for filtering. |
java.lang.String |
invertSelectionTipText()
Returns the tip text for this property |
java.util.Enumeration |
listOptions()
Returns an enumeration describing the available options. |
static void |
main(java.lang.String[] argv)
Main method for testing this class. |
void |
setAttributeIndices(java.lang.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(java.lang.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. |
java.lang.String |
transformAllValuesTipText()
Returns the tip text for this property |
Methods inherited from class weka.filters.Filter |
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batchFilterFile, batchFinished, filterFile, getCapabilities, getOutputFormat, isFirstBatchDone, isNewBatch, isOutputFormatDefined, makeCopies, makeCopy, numPendingOutput, output, outputPeek, toString, useFilter, wekaStaticWrapper |
Methods inherited from class java.lang.Object |
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equals, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public NominalToBinary()
Method Detail |
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public java.lang.String globalInfo()
public Capabilities getCapabilities()
getCapabilities
in interface CapabilitiesHandler
getCapabilities
in class Filter
Capabilities
public boolean setInputFormat(Instances instanceInfo) throws java.lang.Exception
setInputFormat
in class Filter
instanceInfo
- an Instances object containing the input
instance structure (any instances contained in the object are
ignored - only the structure is required).
java.lang.Exception
- if the input format can't be set
successfullypublic boolean input(Instance instance)
input
in class Filter
instance
- the input instance
java.lang.IllegalStateException
- if no input format has been setpublic java.util.Enumeration listOptions()
listOptions
in interface OptionHandler
public void setOptions(java.lang.String[] options) throws java.lang.Exception
-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.
setOptions
in interface OptionHandler
options
- the list of options as an array of strings
java.lang.Exception
- if an option is not supportedpublic java.lang.String[] getOptions()
getOptions
in interface OptionHandler
public java.lang.String binaryAttributesNominalTipText()
public boolean getBinaryAttributesNominal()
public void setBinaryAttributesNominal(boolean bool)
bool
- true if binary attributes are to be treated as nominal onespublic java.lang.String transformAllValuesTipText()
public boolean getTransformAllValues()
public void setTransformAllValues(boolean bool)
bool
- true if all nominal value are transformed into new attributespublic java.lang.String invertSelectionTipText()
public boolean getInvertSelection()
public void setInvertSelection(boolean invert)
invert
- the new invert settingpublic java.lang.String attributeIndicesTipText()
public java.lang.String getAttributeIndices()
public void setAttributeIndices(java.lang.String rangeList)
rangeList
- a string representing the list of attributes. Since
the string will typically come from a user, attributes are indexed from
1. java.lang.IllegalArgumentException
- if an invalid range list is suppliedpublic static void main(java.lang.String[] argv)
argv
- should contain arguments to the filter:
use -h for help
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