[R] plots

[Duncan Murdoch]

Romain Francois wrote:
> Le 11.02.2006 19:44, statistical.model at googlemail.com a écrit :
> 
>>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
> 
>>can anybody help me?
>>
>>thanks in advance
>>
>>Roberto Furlan
>>University of Turin
>>  
> 
>