R help - May 2007 - Function tsmooth

Hi,

Assume that we may model the Nottingham temperature data (nottem) or Sunspot 
data (sunspot) set by a nonparametric autoregressive model of the form
                               Yt = m(Yt-1) + et.

Using the kernel estimation method, produce the resulting plots. We may use 
the fucntion
tsmooth(x,y,"notmal",bandwidth=0.01).

How can i define x and y using data nottem and sunspot?

Thanks a lot!
Owen