function y=functent(x)
%
%  Function to return the Tent Map iterated nrepeat times
%
global nrepeat      % Needs nrepeat shared with calling program
xx=x;               % In this case don't want to overwrite calling argument
for k=1:nrepeat
  xx=2*(0.5-abs(xx-1/2));        % Mapping is x(n+1)=2*(0.5-abs(1/2-x_n))
end
y=xx;