How can i generate random numbers from an array?

I want to generate random numbers from the array actionset=[]; but those numbers are also negative and decimal numbers. Below is my code so if anyone could help i would appreciate it.More specific I want to correct the row in the program before the last.

    current_state=randi([1,12]);
##    while current_state~=goal_state
    actionset=[];
    for action=1:2
      if reward(current_state,action)~=-inf
        actionset(end+1)=action;
      endif
    endfor
    action=actionset(randn(numel(actionset)));
    next_state=nextstate1(action);

[KALYAN ACHARJYA]

The answer is here, Check it.

Also here