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

If you would like to use an external library, Apache Commons Math provides the utility to transpose a matrix. Please refer to it official site.

First, you have to create a double array double[][] arr, as you have already done. Then, the transposed 2d matrix can be achieved like this

MatrixUtils.createRealMatrix(arr).transpose().getData()