MATLAB: How do you pick a random number from a vector, just once

random

for example the vector could be v = [1 2 3]

v = [1 2 3] ;
iwant = v(randperm(length(v),1))

random_element = v(randi(numel(v)))

randi([2 3])

%or

v=[2 3];
v(randi(2))