計算平均返回浮點數[]中的java

Question

我有Float[]類型的ArrayList，我試圖以計算ArrayList那些Float[]的平均值; 如：

[1.5,5.5,2.5,3.0,7.5] 
[2.5,7.5,4.5,3.5,9.5] 
[8.5,5.5,6.5,4.0,1.5] 
[5.5,8.5,6.5,2.0,4.5] 

和希望的

[4.5,6.75,5.0,3.125,5.75]][1] 

Answer 1

Float[] newCluster = new Float[cols]; 
     for (int i=0; i<cols; i++) 
     { 
      float sum=0; 
      for (int j=0;j<cluster1.size();j++) 
      { 
//    System.out.println(cluster1.get(j)[i]); 
       sum += cluster1.get(j)[i]; 
      } 
      newCluster[i] = sum/cluster1.size(); 
     } 
     System.out.println(Arrays.toString(newCluster)); 
    }