?predict.lm in R 1.9.0 provides examples. 
hope this helps.  spencer graves
Linda portman wrote:
>How can I add confidence intervals (pointwise and family) around the curves?
>The curve is made by plot(x,y). Thanks!
> 
> 
> 
>
>		
>---------------------------------
>
>
>	[[alternative HTML version deleted]]
>
>______________________________________________
>R-help at stat.math.ethz.ch mailing list
>https://www.stat.math.ethz.ch/mailman/listinfo/r-help
>PLEASE do read the posting guide!
http://www.R-project.org/posting-guide.html
>  
>