plots

Romain Francois wrote:

Le 11.02.2006 19:44, statistical.model at googlemail.com a ??crit :

Hi all,
I have a basic question. how can i visualize two or more density 
curves on
the same plot?

ex:
x1<-runif(100,10,80)
x2<-runif(100,1,100)
kernelgraf<-density(x1,kernel = "gaussian", width= 20)
plot(kernelgraf, xlab="Probability", xlim=c(0,100), ylim=c(0,.1),
col=rgb(0,1,0), main="")
kernelgraf<-density(x2,kernel = "gaussian", width= 20)
points(kernelgraf, xlab="Probability", xlim=c(0,100), ylim=c(0,.1),
col=rgb(0,0,1), main="")

here i am using plot + points, but i do not like the graphical 
output for
points.
 

You are almost there, replace your last command by :

points(kernelgraf, type="l", col="blue")

Romain

PS : Maybe a function points.density setting type="l" would be a good 
thing ?

Or maybe use

lines(kernelgraf, type="l", col="blue")

As I always say, when you want lines, use lines().

Duncan Murdoch