Transpose double matrix with a Java function

Question

Below is my function to transpose a Matrix in Java which has the form double [][]:

public static double[][] transposeMatrix(double [][] m){

    for (int i = 0; i < m.length; i++) {

        for (int j = i+1; j < m[0].length; j++) {

            double temp = m[i][j];

            m[i][j] = m[j][i];

            m[j][i] = temp;

        }

    }

    return m;

}

But it’s not working properly. Can anyone tell me what I’m doing wrong here?

Answer 1

Check the code below:

 public static double[][] transposeMatrix(double [][] m){

        double[][] temp = new double[m[0].length][m.length];

        for (int i = 0; i < m.length; i++)

            for (int j = 0; j < m[0].length; j++)

                temp[j][i] = m[i][j];

        return temp;

    }

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