function y=f(x)
% The function must be able to take x as a vector and 
% returns y as a vector of the same size in this case. 
% Thus, one should use ".*", "./" and ".^" instead of "*", "/" and "^"
% as in the example below:
% y=(x.*(x+2)+x.^4)./x;

y=sin(x+1);

return