Write a MATLAB code that generates a random upper-triangular matrix U of size n.

I am new to MATLAB and not sure how to start. please help. Write a MATLAB code that generates a random upper-triangular matrix U of size n.

[Guillaume]

" not sure how to start"

By making an effort? This, or something similar, is going to be covered in any book or tutorial about matlab within the first few chapters if not the first.

[Stephen23]

Well, how about doing the Introductory Tutorials:

https://www.mathworks.com/help/matlab/getting-started-with-matlab.html

and reading this:

https://www.mathworks.com/matlabcentral/answers/228557-experts-of-matlab-how-did-you-learn-any-advice-for-beginner-intermediate-users

Answer 1

[Andrei Bobrov]

out = triu(rand(n))

Answer 2

[KSSV]

n = 10 ;
A = zeros(n) ;
for i = 1:n
    for j = 1:n
        if i<j
            A(i,j) = rand ;
        end
    end
end

Also check triu