线程＆＃34; main＆＃34;中的例外情况weka.core.UnassignedClassException：未设置类！

Question

  public class Main {
  public static void main(String[] args) throws IOException, Exception{
 BufferedReader reader = new BufferedReader(
   new FileReader("E:\\TRAIN.arff"));
  Instances training = new Instances(reader);
  BufferedReader reader1 = new BufferedReader(
  new FileReader("E:\\TEST.arff"));
  Instances test = new Instances(reader1);
  NaiveBayes nb = new NaiveBayes();
  //Use multilable classifier Binary Relevance (BR)
  BR br = new BR();
  //add naivebayes into BR
  br.setClassifier(nb);
  br.buildClassifier(training);
  Evaluation eval = new Evaluation(training);
  eval.evaluateModel(br,test);
   }
}

我错了这段代码之后，错误显示：线程“main”中的异常weka.core.UnassignedClassException：未设置类！也许我错误地将naivebayes添加到BR分类器中，如何修改我的代码？

Answer 1

您需要在数据集中选择属性，该属性将负责类标签。 例如：

training.setClass(data.attribute("NameOfAttribute"));