how to learn more from R

Now I want to know how much R can do .where can i get some examples or
demo resource to study advanced function of R ?

Not really what you were thinking of, I guess, but don?t overlook the ?demo? 
function. For example, try ?demo(graphics)?.

Type ?demo()? for a list of demos, but note that more become available when 
you load new packages (try the ?rgl?, ?lattice? and ?animation? packages for 
some nice graphical demos).

Karl Ove Hufthammer