List <Cluster <DoublePoint>>設置爲<DoublePoint>

-1

我正在嘗試使用DBSCANClusterer（apache.math3）對我生成的一組點進行排序並將其寫入文件。在這一點上，我被困在這裏：List <Cluster <DoublePoint>>設置爲<DoublePoint>

public Set<DoublePoint> DBSCAN(Set<DoublePoint> set2) { 
     Set<DoublePoint> points = new Set<DoublePoint>(); 
     DBSCANClusterer<DoublePoint> dbscan = new DBSCANClusterer<DoublePoint>(1, 15); 
     //run dbscan on set of points 
     List<Cluster<DoublePoint>> clusters = dbscan.cluster(set2); 
     **sorted = clusters???**

我如何分配：List<Cluster<DoublePoint>> clusters到Set<DoublePoint> sorted？我猜它應該是2D-> 1D的東西！

這裏是我的代碼的其餘部分：

import java.awt.Point; 
    import java.io.*; 
    import java.util.*; 
    import org.apache.commons.math3.ml.clustering.Cluster; 
    import org.apache.commons.math3.ml.clustering.DBSCANClusterer; 
    import org.apache.commons.math3.ml.clustering.DoublePoint; 
    import java.util.HashSet; 
    import java.util.Random; 
    import java.util.Set; 


public class Main { 

    public static void main(final String[] args) throws Exception { 
     new Main().run(); 
    } 

    public void run() { 
     Set<DoublePoint> set = generateSetPoints(); 
     try { 
      writeToFile(set, "points"); 
     } catch(IOException ex) { 
      System.out.println("IO Exception while writing to file"); 
     } 

     Set<DoublePoint> set_by_dbscan = dbScan(set);// 
     try { 
      writeToFile(set_by_dbscan, "by_dbscan"); 
     } catch(IOException ex) { 
      System.out.println("IO Exception while writing to file"); 
     } 

    } 

    public Set<DoublePoint> generateSetPoints() { 
     int xx=100; 
     int yy=100; 
     Set<DoublePoint> set = new HashSet<>(); 
     Random rnd = new Random(); 
     int number=100; 
     do{ 
      int tmp[] = new int[2]; 

      tmp[0] = rnd.nextInt(xx); 
      tmp[1] = rnd.nextInt(yy); 
      DoublePoint rndpoint = new DoublePoint(tmp); 
      set.add(rndpoint); 
     } 
     while (set.size()<number); 
     return set; 
    } 

    public void writeToFile(Set<DoublePoint> set, String filename) throws IOException { 
     File fout = new File(filename + ".txt"); 
     FileOutputStream fos = new FileOutputStream(fout); 

     BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(fos)); 

     for (DoublePoint p: set) { 
      bw.write(p.getPoint()[0] + "," + p.getPoint()[1]); 
      bw.newLine(); 
     } 

     bw.close(); 
    } 

    public Set<DoublePoint> dbScan(Set<DoublePoint> set2) { 
     Set<DoublePoint> points = new Set<DoublePoint>(); 
     DBSCANClusterer dbscan = new DBSCANClusterer(1, 15); 
     List<Cluster<DoublePoint>> clusters = dbscan.cluster(set2); 
     return clusters; 
    } 
}

來源

2017-02-02 JesteR

HashSet的是未排序數據結構。

如果您想要對sorted進行排序，請使用保留順序的東西。

sorted = nes HashSet<>()是一個真正的跆拳道...

此外，DBSCAN並不意味着排序。改用OPTICS集羣。

來源

2017-02-02 22:02:27

謝謝你的回答！所以，我應該使用TreeSet結構來保持順序。是的，排序未排序的名稱是錯誤的，但我應該使用DBScan處理隨機生成的點，我創建，保存和加載文件。我更新了原始帖子，以包括我所有的代碼......任何建議？ – JesteR

請注意，它是DBSCAN，全部大寫。我仍然沒有得到你想要「排序」的東西。 DBSCAN不排序。 –

通過使用DBSCAN，我想從隨機生成的點創建羣集。然後將它們保存在一個輸出文件中，並在GNUPLOT中使用它們來顯示它們。你能幫我嗎？ – JesteR

List <Cluster <DoublePoint>>設置爲<DoublePoint>

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