Weka中的java

Question

錯誤：在weka.core.Capabilities.testWithFail（Capabilities.java:1302） 在weka.classifiers.trees.j48.C45PruneableClassifierTree.buildClassifier（C45PruneableClassifierTree.java:116） 在weka.classifiers.trees .J48.buildClassifier（J48.java:236） 在Classify.main（Classify.java:45）

basically the run time error is at the line nb1.buildClassifier(train); 







import java.io.BufferedReader; 
    import java.io.FileNotFoundException; 
    import java.io.FileReader; 
    import weka.classifiers.Classifier; 
    import weka.classifiers.Evaluation; 
    import weka.classifiers.evaluation.NominalPrediction; 
    import weka.classifiers.rules.DecisionTable; 
    import weka.classifiers.rules.PART; 
    import weka.classifiers.trees.DecisionStump; 
    import weka.classifiers.trees.J48; 
    import weka.core.FastVector; 
    import weka.core.Instances; 
    import java.io.*; 
    import weka.classifiers.bayes.NaiveBayes; 
    import java.io.BufferedWriter; 
    import weka.core.*; 

public class Classify { 



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

BufferedReader breader=null; 

Instances train=new Instances(breader); 




train.setClassIndex(train.numAttributes() -1); 



breader=new BufferedReader(new FileReader("C://Users/user/Desktop/test.arff")); 
        Instances test=new Instances (breader); 




        Instances labeled = new Instances(test); 


         double clsLabel=tree.classifyInstance(test.instance(i)); 
         labeled.instance(i).setClassValue(clsLabel); 









       } 
    } 
        ` 

Answer 1

在我看來，它不能處理多值標稱類。嘗試更改類屬性的類型或嘗試其他分類器。