Question

我试图在数组中插入双精度数（D [i] [j] = distance;），但出现此错误：需要数组但找到了双精度！我看不到我的错误！请帮助这是代码：

 public static double[] D=new double[1000];

public static void main(String[] args) {
    // Data points matrice: X
    double X[][] = { {0.5,0.3,0.25,0.4},
                     {0.4,0.33,0.26,0.7},
                     {0.1,0.9,0.34,0.77},
                     {0.1,0.98,0.28,0.4},
                     {0.75,0.63,0.51,0.6}};

    for (int i=0; i<X.length-1;i++){ 
        for (int z=0; z<X.length; z++){
            double d=0;
            for (int j=0; j<X[i].length;j++){
                   if (i!=z){

                   System.out.println(X[i][j]+"et"+X[z][j]);  
                   d=d+Math.pow((X[i][j]-X[z][j]),2);
                   }else {d=0;}   

                   System.out.println(d);  
                   double distance= Math.sqrt(d);
                   D[i][j]=distance;

            }   
        System.out.println("*****"); 

        }

Answer 1

D[i] = distance;是一维阵列，而不是2D阵列

我想你打算写

如果没有，那么您需要将(?:287434|383460|633491|717255|827734|253735|635373|553888|910366)从一维数组更改为二维数组

Answer 2

如果将D的声明更改为以下内容，它将起作用：

public static double[][] D = new double[5][5];

这使D成为二维数组而不是一维数组。

如何在数组[] []中插入double？

2 个答案: