[R] Highlight overlapping area between two curves

Christos Hatzis christos at nuverabio.com
Tue Mar 13 05:24:50 CET 2007


See
http://addictedtor.free.fr/graphiques/RGraphGallery.php?graph=7

and code therein.

-Christos 

> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch 
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Nguyen 
> Dinh Nguyen
> Sent: Tuesday, March 13, 2007 12:20 AM
> To: r-help at stat.math.ethz.ch
> Subject: [R] Highlight overlapping area between two curves
> 
> Dear R helpers,
> I have a graph as following; I would like to highlight the 
> overlapping area between the two curves. Do you know how to do this?
> Thank you in advance for your help.
> Nguyen
> 
> ###START
> x1 <- rnorm(10000, 0.70,0.12)
> x2 <- rnorm(10000, 0.90,0.12)
> 
> d1 <- density(x1)
> d2 <- density(x2)
> 
> plot(range(d1$x,d2$x), range(d1$y, d2$y), type = "n",
>      xlab = "X value", ylab = "Probability Density" )
> 
> lines(d1, col = "red",lwd=4, lty=2)
> lines(d2, col = "blue",lwd=4)
> 
> ##END CODE
> 
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