import java.text.DecimalFormat; import java.lang.Math; public class Matrix { //private private double [][] x; private int N; private int M; //constructor Matrix(int rows, int cols) { x = new double [rows][cols]; this.N=rows; this.M=cols; } //random factory static Matrix random(int rows, int cols) { Matrix r = new Matrix(rows,cols); for (int n=0;n