Question

我正在尝试使用weka（3.8.1版本）在java中编写一个clasifier，但我找到了一个能够工作的分类器的trubels。我正在使用NaiveByes。

    public static void main(String[] args) throws Exception {

    ConverterUtils.DataSource source1 = new ConverterUtils.DataSource("/home/crina/workspace/lic/train.arff");
    Instances train = source1.getDataSet();
    if (train.classIndex() == -1)
        train.setClassIndex(train.numAttributes() - 1);

    ConverterUtils.DataSource source2 = new ConverterUtils.DataSource("/home/crina/workspace/lic/test.arff");
    Instances test = source2.getDataSet();
    if (test.classIndex() == -1)
        test.setClassIndex(train.numAttributes() - 1);

    NaiveBayes naiveBayes = new NaiveBayes();
    naiveBayes.buildClassifier(train);

    double label = naiveBayes.classifyInstance(test.instance(0));
    test.instance(0).setClassValue(label);

    System.out.println(test.instance(0));
}

在train.arff，我有类似的东西：

@relation MyRelation
@attribute id_student numeric
@attribute subject_id numeric
@attribute teacher_id numeric
@attribute level numeric
@attribute isMandatory numeric
@attribute class numeric

@data
2,1,1,5,1,80
2,3,2,5,1,100
....

到目前为止，我收到了这个错误：

Exception in thread "main" weka.core.UnsupportedAttributeTypeException: weka.classifiers.bayes.NaiveBayes: Cannot handle numeric class!

java中数字类wekka的分类器

0 个答案: