Simple matrix logic in R

Question

A program that asks the user for the 8 values of a 2, 2x2 mathematical matrix. Another words, there are 4 values in one 2x2 matrix and another 4 values for the second matrix. And It should prompt a message to the user asking what operation they want to do with it like addition, subtraction, division, multiplication etc.

Answer 1

In R, if you have a matrix:

m1 <- matrix(c(2,2,2,2), ncol = 2)
m2 <- matrix(c(4,4,4,4), ncol = 2)  

and you want to add/subtract/divide/multiple the two you simply:

m1 + m2 
     [,1] [,2]
[1,]    6    6
[2,]    6    6

If you store the inputted values in a list, you can refer to it inside the matrix function as above:

matrix(user_input, ncol = 2)
#or
matrix(c(ui1, ui2, ui3, ui4), ncol = 2)