transpose double[][] matrix with a java function?

Question

Do anybody have a function with which I can transpose a Matrix in Java which has the following form:

double[][]

I have function like this:<

Answer 1

Here is the method

public static double[][] transpose(double arr[][]){
    int m = arr.length;
    int n = arr[0].length;
    double ret[][] = new double[n][m];

    for (int i = 0; i < m; i++) {
        for (int j = 0; j < n; j++) {
            ret[j][i] = arr[i][j];
        }
    }

    return ret;
}