plotting line from a certain position

Hi folks,

    > this might be a trivial question, but I could not figure
    > it out from the documentation or the examples.

    > I have a plot where the x-scale ranges from 0 to 20. When
    > I plot a line it automatically starts at x=0. I would like
    > the line to start at x=1. Is there a way to how I can do
    > that?

If I understand your question correctly, you want to set the xlim to
range from 1-20 even if your data range from 0-20

  >>> plot(x,y)
  >>> xlim(1,20)