[R] fill in area between 2 lines with a color

[David Freedman]

Hi - I'd like to have the area between 2 lines on a x-y plot be filled with
grey, but I haven't had
any luck using polygon or rect.  (In reality, I'd like to do this for twice
- once for a low group and once for a high group - and then I'd like to plot
a set of data points for a 'normal' group together with these 2 grey areas.)

Here's a simple example of the 2 lines:
     
age=1:10
y.low=rnorm(length(age),150,25)+10*age
y.high=rnorm(length(age),250,25)+10*age
plot(age,y.high,type='n',ylim=c(100,400),ylab='Y Range',xlab='Age (years)')
lines(age,y.low,col='grey')
lines(age,y.high,col='grey')

Is it possible to fill the area between the 2 lines filled with, for
example, 'grey30' ?

thanks very much in advance,
David Freedman

-----
David Freedman
Atlanta
-- 
View this message in context: http://www.nabble.com/fill-in-area-between-2-lines-with-a-color-tp18556096p18556096.html
Sent from the R help mailing list archive at Nabble.com.