MATLAB: How to find random number between 20 input numbers

Question

I have 20 numbers that I want to find 1 or 2 or 3 of them as random. Could you help me to write code or any function that generate random number?

Answer 1

L = length(YourVectorOfNumbers);
num_to_pick = randi(3);
which_to_pick = randperm(L, num_to_pick);
picked_values = YourVectorOfNumbers(which_to_pick);