Write a wellcommented Matlab function program mysolvecheck w

Write a well-commented Matlab function program mysolvecheck with input a number n that makes a random n × n matrix A and a random vector b, solves the linear system Ax = b, calculates the norm of the residual r = Ax b, and outputs that number as the error e

Solution

%taking input
n = input(\'Enter n: \');

%creating a random matrix A of nXn
A = rand(n, n);

%creating a random matrix b of nX1
b = rand(n, 1);

%calculating x using inverse(A) * b
x = A\\b;

%calculatin r
r = A*x-b;

%calculating norm of r
e = norm(r);

%displaying error
disp([\'e = \', num2str(e)]);