小编Jay*_*Jay的帖子

我在下面有这个类,我根据wiki和论文中给出的例子构建它,为什么SympleKMeans不能处理数据？该类可以打印Datasource dados,因此处理文件没有任何问题,错误在构建上.

package slcct;

import weka.clusterers.ClusterEvaluation;
import weka.clusterers.SimpleKMeans;
import weka.core.Instance;
import weka.core.Instances;
import weka.core.converters.ConverterUtils.DataSource;


public class Cluster {

public String path;
public Instances dados;
public String[] options = new String[2];

public Cluster(String caminho, int nclusters, int seed ){
    this.path = caminho;
    this.options[0] = String.valueOf(nclusters);
    this.options[1] = String.valueOf(seed);

}

public void ledados() throws Exception{

    DataSource source = new DataSource(path);
    dados = source.getDataSet();
    System.out.println(dados)

    if(dados.classIndex()==-1){
        dados.setClassIndex(dados.numAttributes()-1);
    }
}

public void imprimedados(){
    for(int i=0; i<dados.numInstances();i++)
    {
        Instance actual = dados.instance(i);
        System.out.println((i+1) + " …

我有以下代码,其中逐行读取.csv文件,并存储在String [] nextline中,其中nextline [i]由解析文件的相应内容填充.我在读取.csv文件时没有遇到任何问题,但我确实将它们存储在另一个String []中,因为System.out.println()为所有行提供了以下结果:

Nextline[1]=Jan  4, 2011 18:33:15.988422000 / predata=null / Nextline[4]=54 / size:0

如您所见,Strin []具有null值,为什么内容未传递？提前致谢

public class Amostra {
    int[] id = new int[20000];
    String[] predata = new String[20000];
    int[] size = new int[20000];

    Amostra(String namefile) throws FileNotFoundException, IOException {
        Csv2Array(namefile);
    }

    private void Csv2Array(String newfile) throws FileNotFoundException, IOException 
    {
        String[] nextline;
        int j = 0;
        int i = 0;
        CSVReader reader = new CSVReader(new FileReader(newfile), ';', '\'', 1);
        while((nextline = reader.readNext()) != null){
            predata[i] = nextline[1];
            size[i] …