MATLAB: Improve this function in terms of speed

Question

In my simulation this function is called many time and I would improve in terms of speed this function so I can earn in execution time this is the function

function [ruffled_head] = ruffle_head(head_rcv)
while 1
    ruffled_head = head_rcv(randi(length(head_rcv));
      if ruffled_head ~= 0
          break;
      end
  end
end

this function receives a vector that is made of integer values and also zeros. it should return an integer value different from zero. I think that this function could be better.Any idea how to improve?

Answer 1

t = head_rcv(head_rcv ~= 0);
ruffled_head = t(randi(length(t)));