MATLAB: How to create a vector “a” when a(1)=rand,​a(2)=a(1)+​rand) a(3)=a(2)+rand whithout loop

Question

how to create a vector "a", when a(1)=rand,a(2)=a(1)+rand) a(3)=a(2)+rand whithout loop thanks:)

Answer 1

Use rand and cumsum together:

N = 3;
A = rand(1,N);
B = cumsum(A);