[R] shadow between two lines in plot()

Jim Lemon jim at bitwrit.com.au
Thu Aug 2 12:48:26 CEST 2007

Ding, Rebecca wrote:
>  Dear R users,
> I used the following code to draw a scatter plot. 
> plot(x,y,type="n")
> points(x,y,pch=1)
> And then I used the abline functions to draw two lines. I want to add
> the shadow between those two lines. 
> abline(h=200)
> abline(h=300)
> Any suggestions?
Hi Rebecca,
Have a look at polygon.shadow in the plotrix package. You can display a 
shadow-like figure based on any polygon.


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