weka k fold程序上的Java异常

weka k fold程序上的Java异常,java,weka,cross-validation,Java,Weka,Cross Validation,我想对我的数据执行10倍交叉验证,我使用了weka java程序。但是,我遇到了异常问题 以下是例外情况: ---Registering Weka Editors--- Trying to add database driver (JDBC): jdbc.idbDriver - Error, not in CLASSPATH? Exception in thread "main" java.lang.IllegalArgumentException: No suitab

我想对我的数据执行10倍交叉验证,我使用了weka java程序。但是,我遇到了异常问题

以下是例外情况:

    ---Registering Weka Editors---
    Trying to add database driver (JDBC): jdbc.idbDriver - Error, not in CLASSPATH?

    Exception in thread "main" java.lang.IllegalArgumentException: No suitable converter found for ''!

    at weka.core.converters.ConverterUtils$DataSource.<init>(ConverterUtils.java:137)
    at weka.core.converters.ConverterUtils$DataSource.read(ConverterUtils.java:441)
    at crossvalidationmultipleruns.CrossValidationMultipleRuns.main(CrossValidationMultipleRuns.java:45)

C:\Users\TomXavier\AppData\Local\NetBeans\Cache\8.1\executor-snippets\run.xml:53: Java returned: 1
BUILD FAILED (total time: 1 second)
——注册Weka编辑器---
正在尝试添加数据库驱动程序(JDBC):JDBC.idbDriver-错误,不在类路径中?
线程“main”java.lang.IllegalArgumentException中出现异常:未找到适用于“”的转换器!
位于weka.core.ConverterUtils.ConverterUtils$DataSource。(ConverterUtils.java:137)
位于weka.core.ConverterUtils.ConverterUtils$DataSource.read(ConverterUtils.java:441)
位于crossvalidationmultipleruns.crossvalidationmultipleruns.main(crossvalidationmultipleruns.java:45)
C:\Users\TomXavier\AppData\Local\NetBeans\Cache\8.1\executor snippets\run.xml:53:Java返回:1
生成失败(总时间:1秒)
以下是我使用的程序:

import weka.core.Instances;
import weka.core.converters.ConverterUtils.DataSource;
import weka.core.Utils;
import weka.classifiers.Classifier;
import weka.classifiers.Evaluation;

import java.util.Random;

/**
 * Performs a single run of cross-validation.
 *
 * Command-line parameters:
 * <ul>
 *    <li>-t filename - the dataset to use</li>
 *    <li>-x int - the number of folds to use</li>
 *    <li>-s int - the seed for the random number generator</li>
 *    <li>-c int - the class index, "first" and "last" are accepted as well;
 *    "last" is used by default</li>
 *    <li>-W classifier - classname and options, enclosed by double quotes; 
 *    the classifier to cross-validate</li>
 * </ul>
 *
 * Example command-line:
 * <pre>
 * java CrossValidationSingleRun -t anneal.arff -c last -x 10 -s 1 -W "weka.classifiers.trees.J48 -C 0.25"
 * </pre>
 *
 * @author FracPete (fracpete at waikato dot ac dot nz)
 */
public class CrossValidationSingleRun {

  /**
   * Performs the cross-validation. See Javadoc of class for information
   * on command-line parameters.
   *
   * @param args        the command-line parameters
   * @throws Excecption if something goes wrong
   */
  public static void main(String[] args) throws Exception {
    // loads data and set class index
    Instances data = DataSource.read(Utils.getOption("C:/Users/TomXavier/Documents/MATLAB/total_data.arff", args));
    String clsIndex = Utils.getOption("first", args);
    if (clsIndex.length() == 0)
      clsIndex = "last";
    if (clsIndex.equals("first"))
      data.setClassIndex(0);
    else if (clsIndex.equals("last"))
      data.setClassIndex(data.numAttributes() - 1);
    else
      data.setClassIndex(Integer.parseInt(clsIndex) - 1);

    // classifier
    String[] tmpOptions;
    String classname;
    tmpOptions     = Utils.splitOptions(Utils.getOption("weka.classifiers.trees.J48", args));
    classname      = tmpOptions[0];
    tmpOptions[0]  = "";
    Classifier cls = (Classifier) Utils.forName(Classifier.class, classname, tmpOptions);

    // other options
    int seed  = Integer.parseInt(Utils.getOption("1", args));
    int folds = Integer.parseInt(Utils.getOption("10", args));

    // randomize data
    Random rand = new Random(seed);
    Instances randData = new Instances(data);
    randData.randomize(rand);
    if (randData.classAttribute().isNominal())
      randData.stratify(folds);

    // perform cross-validation
    Evaluation eval = new Evaluation(randData);
    for (int n = 0; n < folds; n++) {
      Instances train = randData.trainCV(folds, n);
      Instances test = randData.testCV(folds, n);
      // the above code is used by the StratifiedRemoveFolds filter, the
      // code below by the Explorer/Experimenter:
      // Instances train = randData.trainCV(folds, n, rand);

      // build and evaluate classifier
      Classifier clsCopy = Classifier.makeCopy(cls);
      clsCopy.buildClassifier(train);
      eval.evaluateModel(clsCopy, test);
    }

    // output evaluation
    System.out.println();
    System.out.println("=== Setup ===");
    System.out.println("Classifier: " + cls.getClass().getName() + " " + Utils.joinOptions(cls.getOptions()));
    System.out.println("Dataset: " + data.relationName());
    System.out.println("Folds: " + folds);
    System.out.println("Seed: " + seed);
    System.out.println();
    System.out.println(eval.toSummaryString("=== " + folds + "-fold Cross-validation ===", false));
  }
}
导入weka.core.Instances;
导入weka.core.ConverterUtils.DataSource;
导入weka.core.Utils;
导入weka.classifiers.Classifier;
导入weka.classifiers.Evaluation;
导入java.util.Random;
/**
*执行单次交叉验证。
*
*命令行参数:
*
    *
  • -t文件名-要使用的数据集
  • *
  • -x int-要使用的折叠数
  • *
  • -s int-随机数生成器的种子
  • *
  • -c int-类索引,“第一”和“最后”也可接受; *默认情况下使用“last”
  • *
  • -W分类器-类名和选项,用双引号括起来; *要交叉验证的分类器
  • *
* *命令行示例: * *java CrossValidationSingleRun-t anneal.arff-c last-x10-s1-W“weka.classifiers.trees.J48-c0.25” * * *@作者Fracpet(新西兰怀卡托ac dot的Fracpet) */ 公共类交叉验证SingleRun{ /** *执行交叉验证。有关信息,请参阅类的Javadoc *在命令行参数上。 * *@param指定命令行参数 *@如果出现问题,则抛出异常 */ 公共静态void main(字符串[]args)引发异常{ //加载数据并设置类索引 实例数据=DataSource.read(Utils.getOption(“C:/Users/TomXavier/Documents/MATLAB/total_data.arff”,args)); 字符串clsIndex=Utils.getOption(“first”,args); if(clsIndex.length()=0) clsIndex=“last”; if(clsIndex.equals(“first”)) data.setClassIndex(0); else if(clsIndex.equals(“last”)) data.setClassIndex(data.numAttributes()-1); 其他的 data.setClassIndex(Integer.parseInt(clsIndex)-1); //分级机 字符串[]tPoputions; 字符串类名称; tmpOptions=Utils.splitOptions(Utils.getOption(“weka.classifiers.trees.J48”,args)); classname=tmpOptions[0]; tmpOptions[0]=“”; 分类器cls=(分类器)Utils.forName(分类器.class、类名、tmpOptions); //其他选择 int seed=Integer.parseInt(Utils.getOption(“1”,args)); int folds=Integer.parseInt(Utils.getOption(“10”,args)); //随机化数据 随机rand=新随机(种子); 实例randData=新实例(数据); 随机数据(rand); if(randData.classAttribute().isNominal()) randData.分层(褶皱); //执行交叉验证 评估评估=新评估(randData); 对于(int n=0;n
这个问题有什么解决办法吗


非常感谢

将驱动程序添加到classpath?根据weka的网站,驱动程序错误可以忽略,因为我不尝试访问数据库。但如果问题与数据库有关,我可以尝试修复它。这个问题还有其他可能的解决办法吗?谢谢你的回复!