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Editorial Team
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Asked: 2026-05-25T00:26:00+00:00

I have a trained dataset with 125 records. I’m going to classify new instance

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I have a trained dataset with 125 records. I’m going to classify new instance using NaiveBayesUpdatable. but when I run naiveBayes (under windows, using weka 3.4), I get the
following error : 

java.lang.ArrayIndexOutOfBoundsException: 126
    at weka.estimators.DiscreteEstimator.getProbability(Unknown Source)
    at weka.classifiers.bayes.NaiveBayes.distributionForInstance(Unknown Source)
    at weka.classifiers.Classifier.classifyInstance(Unknown Source)
    at Classifier.NaiveBayes.classifyInstance(NaiveBayes.java:190)
    at Classifier.NaiveBayes.classifyWebPage(NaiveBayes.java:106)

when I run the J48 classifier, it runs with no problems.

thanks for any help\ideas.

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1 Answer

  1. Editorial Team

    I think i found the solution. i added the record to dataset and build classifier again. then I could classify it with no problem. but I don’t know why j48 doesn’t need to have record in it’s dataset.

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