1-weka读取iris数据集内容

 

import weka.*;
import weka.classifiers.trees.J48;
import weka.core.Attribute;
import weka.core.Instance;
import weka.core.Instances;
import weka.core.converters.ConverterUtils.DataSource;
public class Enter {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        DataSource source = null;
        try {
            source = new DataSource("E:\\iris.arff");
            Instances instances = source.getDataSet();
            //打印属性名
            int numOfAttributes = instances.numAttributes();
            for(int i = 0; i < numOfAttributes ;++i)
            {
                Attribute attribute = instances.attribute(i);
                System.out.print(attribute.name() + "     ");
            }

            System.out.println();
            //打印实例
            int numOfInstance = instances.numInstances();
            for(int i = 0; i < numOfInstance; ++i)
            {
                Instance instance = instances.instance(i);
                System.out.print(instance.toString() + "     ");
                System.out.println();
            }
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}

 

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