weka k fold程序上的Java异常
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: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
---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!