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Class weka.classifiers.ZeroR
java.lang.Object
|
+----weka.classifiers.Classifier
|
+----weka.classifiers.DistributionClassifier
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+----weka.classifiers.ZeroR
- public class ZeroR
- extends DistributionClassifier
- implements WeightedInstancesHandler
Class for building and using a 0-R classifier. Predicts the mean
(for a numeric class) or the mode (for a nominal class).
- Version:
- $Revision: 1.6 $
- Author:
- Eibe Frank (eibe@cs.waikato.ac.nz)
ZeroR()
-
buildClassifier(Instances)
- Generates the classifier.
classifyInstance(Instance)
- Classifies a given instance.
distributionForInstance(Instance)
- Calculates the class membership probabilities for the given test instance.
main(String[])
- Main method for testing this class.
toString()
- Returns a description of the classifier.
ZeroR
public ZeroR()
buildClassifier
public void buildClassifier(Instances instances) throws java.lang.Exception
Generates the classifier.
- Parameters:
instances
- set of instances serving as training data
- Throws:
- java.lang.Exception - if the classifier has not been generated successfully
- Overrides:
- buildClassifier in class Classifier
classifyInstance
public double classifyInstance(Instance instance)
Classifies a given instance.
- Parameters:
instance
- the instance to be classified
- Returns:
- index of the predicted class
- Overrides:
- classifyInstance in class DistributionClassifier
distributionForInstance
public double[] distributionForInstance(Instance instance) throws java.lang.Exception
Calculates the class membership probabilities for the given test instance.
- Parameters:
instance
- the instance to be classified
- Returns:
- predicted class probability distribution
- Throws:
- java.lang.Exception - if class is numeric
- Overrides:
- distributionForInstance in class DistributionClassifier
toString
public java.lang.String toString()
Returns a description of the classifier.
- Returns:
- a description of the classifier as a string.
- Overrides:
- toString in class java.lang.Object
main
public static void main(java.lang.String argv[])
Main method for testing this class.
- Parameters:
argv
- the options
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