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Class weka.filters.unsupervised.attribute.NominalToBinary 

java.lang.Object
    |
    +----weka.filters.Filter
            |
            +----weka.filters.unsupervised.attribute.NominalToBinary
public class NominalToBinary
extends Filter
implements UnsupervisedFilter, OptionHandler
Converts all nominal attributes into binary numeric attributes. An attribute with k values is transformed into k binary attributes (using the one-attribute-per-value approach). Binary attributes are left binary. Valid filter-specific options are:

-N
If binary attributes are to be coded as nominal ones.

Version:
$Revision: 1.3 $
Author:
Eibe Frank (eibe@cs.waikato.ac.nz)

Constructor Index

o NominalToBinary()
 

Method Index

o getBinaryAttributesNominal()
Gets if binary attributes are to be treated as nominal ones.
o getOptions()
Gets the current settings of the filter.
o input(Instance)
Input an instance for filtering.
o listOptions()
Returns an enumeration describing the available options.
o main(String[])
Main method for testing this class.
o setBinaryAttributesNominal(boolean)
Sets if binary attributes are to be treates as nominal ones.
o setInputFormat(Instances)
Sets the format of the input instances.
o setOptions(String[])
Parses the options for this object.

Constructor Detail

o NominalToBinary
public NominalToBinary()

Method Detail

o setInputFormat
public boolean setInputFormat(Instances instanceInfo) throws java.lang.Exception
          Sets the format of the input instances.
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:
java.lang.Exception - if the input format can't be set successfully
Overrides:
setInputFormat in class Filter
o input
public boolean input(Instance instance)
          Input an instance for filtering. Filter requires all training instances be read before producing output.
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
Overrides:
input in class Filter
o listOptions
public java.util.Enumeration listOptions()
          Returns an enumeration describing the available options.
Returns:
an enumeration of all the available options.
o setOptions
public void setOptions(java.lang.String options[]) throws java.lang.Exception
          Parses the options for this object. Valid options are:

-N
If binary attributes are to be coded as nominal ones.

Parameters:
options - the list of options as an array of strings
Throws:
java.lang.Exception - if an option is not supported
o getOptions
public java.lang.String[] getOptions()
          Gets the current settings of the filter.
Returns:
an array of strings suitable for passing to setOptions
o 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
o 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
o 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 
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