Determinant of matrix in java? - Answers

/*This function will return the determinant of any two dimensional matrix. For this particular function a two dimensional double matrix needs to be passed as arguments - Avishek Ghosh*/ public double determinant(double[][] mat) { double result = 0; if(mat.length 2) { result = mat[0][0] * mat[1][1] - mat[0][1] * mat[1][0]; return result; } for(int i = 0; i < mat[0].length; i++) { double temp[][] = new double[mat.length - 1][mat[0].length - 1]; for(int j = 1; j < mat.length; j++) { System.arraycopy(mat[j], 0, temp[j-1], 0, i); System.arraycopy(mat[j], i+1, temp[j-1], i, mat[0].length-i-1); } result += mat[0][i] * Math.pow(-1, i) * determinant(temp); } return result; }