You could either write your code like this:
rng default % Allow both code segments to generate the same sequence of random numbers
for t = 1:20
r = rand();
if r < 0.3
e(t) = 1;
elseif r > 0.3 & r < 0.55
e(t) = 2;
elseif r > 0.55 & r < 0.8
e(t) = 3;
else
e(t) = 4;
end
end
e
Or you could use the discretize function.
rng default
r = rand(1, 20);
e = discretize(r, [0 0.3 0.55 0.8 1])
The reason what you'd written didn't work was because in this line:
% elseif rand() > 0.3 & < 0.55
You may have intended for the same random number to be used in the second comparison, but MATLAB has no way of knowing that. So that second part of the statement throws an error.
