Example usage for weka.classifiers Evaluation evaluationForSingleInstance

Introduction

In this page you can find the example usage for weka.classifiers Evaluation evaluationForSingleInstance.

Prototype

public double evaluationForSingleInstance(double[] dist, Instance instance, boolean storePredictions)
        throws Exception 

Source Link

Document

Evaluates the supplied distribution on a single instance.

Usage

From source file:net.sf.jclal.classifier.WekaComitteClassifier.java

License:Open Source License

/**
 * Evaluates the classifier using the test dataset
 *
 * @param instances The test instances./*from www  .ja  v  a  2 s.  co  m*/
 * @return The evaluation of the model.
 */
@Override
public AbstractEvaluation testModel(IDataset instances) {

    try {

        // test phase with the actual model
        Evaluation evaluator;

        evaluator = new Evaluation(new Instances(instances.getDataset(), 0));

        Instances testData = instances.getDataset();

        for (Instance in : testData) {

            double temp[] = distributionForInstance(in);

            evaluator.evaluationForSingleInstance(temp, in, true);

        }

        SingleLabelEvaluation sleval = new SingleLabelEvaluation();

        sleval.setEvaluation(evaluator);

        return sleval;

    } catch (Exception e) {
        Logger.getLogger(WekaComitteClassifier.class.getName()).log(Level.SEVERE, null, e);
    }

    return null;
}

---