Question

You will create a general MxN matrix where M = number of rows and N = number columns that are specified by the user. Write a generic class of matrix that accepts user-defined N and M as input parameters and generates a random matrix. Each cell of the matrix is a random number. matris n (23 54) Example 1: Consider a 2x2 matrix: A = N: = (98 97) 4) where A[i][j] is a random number between (0,99). (54 43 761 Example 2: Consider a 3x3 matrix A = ( 12 98 34 where A[i][j] is a random number between (0,99). (38 43 62) Thus generate a random matrix A. Similarly you can generate matrices of other dimensions by specifying user values Mand N. Perform your operations on these matrices. Design and write Java codes that solves the following: · Matrix Addition (2x2, 3x5) Matrix Multiplication (2x2, 3x5) Show your results with your set of examples. You are free to choose the values of M and N

Why is my multiplication wrong when i do a matrix of 3 x 5 and 2 x 2?

code below

import java.util.*;

public class matrix {

public static void main(String[] args) {

int m, n, i, j;

Random rand = new Random();

Scanner scan = new Scanner(System.in);

System.out.print("enter how many rows:");

m = scan.nextInt();

System.out.print("enter how many columns:");

n=scan.nextInt();

int matrix_1[][] = new int[m][n]; //Initialize matrixes

int maritx_2[][] = new int[m][n];

int matrix_add[][] = new int[m][n];

int matrix_mul[][] = new int[m][n];

for (i = 0; i < m; i++) { //matrix 1 w/ random values 0-99 and print matrix 1

for (j = 0; j < n; j++) {

matrix_1[i][j] = rand.nextInt(99);

}

}

System.out.println("Matrix 1 ");

for (i = 0; i < m; i++) {

for (j = 0; j < n; j++) {

System.out.print(matrix_1[i][j]+" ");

}

System.out.println();

}

for (i = 0 ; i < m ; i++) { //matrix 2 w/ random values 0-99 and print matrix 2

for (j = 0 ; j < n ; j++) {

maritx_2[i][j] =rand.nextInt(99);

}

}

System.out.println("Matrix 2 ");

for (i = 0; i < m; i++) {

for (j = 0; j < n; j++) {

System.out.print(maritx_2[i][j]+" ");

}

System.out.println();

}

System.out.println("Matrix 1 + Matrix 2 :\n");

for (i = 0; i < m; i++) { //Adding of matrix 1 & 2

for (j = 0; j < n; j++) {

matrix_add[i][j] = matrix_1[i][j] + maritx_2[i][j];

}

}

for (i = 0; i < m; i++) {

for (j = 0; j < n; j++) {

System.out.print(matrix_add[i][j]+" ");

}

System.out.println();

}

System.out.println("Matrix 1 x Matrix 2 : \n");

for ( i = 0; i < m; i++) {

for ( j = 0; j < n; j++) {

for (int k = 0; k < m; k++) {

matrix_mul[i][j] = matrix_1[i][k] * maritx_2[k][j];

}

}

}

//print the multiplication matrix result

for (i = 0; i < m; i++) {

for (j = 0; j < n; j++) {

System.out.print(matrix_mul[i][j]+" ");

}

System.out.println();

}

}

}

Answer 1

matrix noi of no. of mulh plication is possible only when columns of ist matrin ů equal to rows of 2nd matrin. If order of ist marrin = mxn, order of and matrin= maxn2 ů possible on this Then marrin multiplication ni = m2 for egg consider 6 2x3 here mulhplication in possible. la 37 ru 57 [294J / El 2x3 bere not 2x2 possible sinu 3 #2