Visualizing a complex valued function of one real parameter I'm looking for a way to capture/graph or visualize it in my head, but I can't find how..  
a 2-dimensional path won't do, because it doesn't reveal the rate-of-change..
2 1-dimensional graphs on top of each other doesn't help much either..
3-dimensional space with 2-dimensional slices for values of the parameter is the best I could come up with..
Is there a better way?

[> with(plots):
  f := z-> exp(I*z):
  complexplot3d(f, -2-2*I .. 2+2*I);


Or
[> complexplot(exp(I*x), x = -Pi .. Pi);


