[R] How can I slightly offset plots?

[Carly Huitema]

Dear R help contributers,

I have several x,y scatter plots and I would like to plot them
slightly offset, similar to:
http://www.mathworks.com/matlabcentral/fx_files/24368/2/content/style4.jpg

I've looked all over for this answer with no luck.
Just a function name or previous example would probably be enough for
me to figure it out.

Thank-you in advance,
Carly