[R] newbie graphics question: Two density plots in same frame ?
I swear I've scoured the help files and several texts before posting what feels like a dumb newbie question. How can I draw two kernel density plots in the same frame ? I have similar variables in two separate data frames, and I would like to show their two histograms/densities in a single picture. Same units, scale, range for both, so I'm simply trying to draw one and then add the other to the picture. Nothin' fancy. Bill Alpert Sr. Editor Barron's 212.416.2742 [EMAIL PROTECTED] [[alternative HTML version deleted]] __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] newbie graphics question: Two density plots in same frame ?
Here's a function that you can customize to fit your needs. lst is a named list.
multicomp - function(lst)
{
clr - c(darkgreen,red,blue,brown,magenta)
alldens - lapply(lst,function(x) {density(x,from=min(x),to=max(x))})
allx - sapply(alldens,function(d) {d$x})
ally - sapply(alldens,function(d) {d$y})
plot(allx,ally,type=n)
for (i in 1:length(lst)) {
lines(alldens[[i]]$x,alldens[[i]]$y,lty=i,col=clr[i],lwd=3)
}
legend(topright,xjust=1,legend=names(lst),lwd=3,lty=1:length(lst),col=head(clr,length(lst)))
}
#---
toplot - list(var1=dfr1$var,var2=dfr2$var)
multicomp(toplot)
-Original Message-
From: Alpert, William [mailto:[EMAIL PROTECTED]
Sent: Thursday, November 03, 2005 11:45 AM
To: r-help@stat.math.ethz.ch
Subject: [R] newbie graphics question: Two density plots in
same frame ?
I swear I've scoured the help files and several texts before posting
what feels like a dumb newbie question.
How can I draw two kernel density plots in the same frame ? I have
similar variables in two separate data frames, and I would
like to show
their two histograms/densities in a single picture. Same
units, scale,
range for both, so I'm simply trying to draw one and then add
the other
to the picture. Nothin' fancy.
Bill Alpert
Sr. Editor
Barron's
212.416.2742
[EMAIL PROTECTED]
[[alternative HTML version deleted]]
__
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide!
http://www.R-project.org/posting-guide.html
__
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] newbie graphics question: Two density plots in same frame ?
To plot two Kernel densities you can use matplot: x1-density(rnorm(100)) x2-density(rnorm(100)) matplot(cbind(x1$y,x2$y), type=l) Or if both distributions are really very similar and you don't have to adjust the axes you can simply use plot(x1) lines(x2, col=red) Finally if you want to have two histograms in the same picture (I would not recomend it tough since the distributions are similar so the overlapping will make it very messy) you can use the argument add within hist hist(rnorm(100), col=red) hist(rnorm(100), col=blue, add=T) I hope this helps Francisco From: Alpert, William [EMAIL PROTECTED] To: r-help@stat.math.ethz.ch Subject: [R] newbie graphics question: Two density plots in same frame ? Date: Thu, 3 Nov 2005 11:45:21 -0500 I swear I've scoured the help files and several texts before posting what feels like a dumb newbie question. How can I draw two kernel density plots in the same frame ? I have similar variables in two separate data frames, and I would like to show their two histograms/densities in a single picture. Same units, scale, range for both, so I'm simply trying to draw one and then add the other to the picture. Nothin' fancy. Bill Alpert Sr. Editor Barron's 212.416.2742 [EMAIL PROTECTED] [[alternative HTML version deleted]] __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] newbie graphics question: Two density plots in same frame ?
On 11/3/05, Alpert, William [EMAIL PROTECTED] wrote: I swear I've scoured the help files and several texts before posting what feels like a dumb newbie question. How can I draw two kernel density plots in the same frame ? I have similar variables in two separate data frames, and I would like to show their two histograms/densities in a single picture. Same units, scale, range for both, so I'm simply trying to draw one and then add the other to the picture. Nothin' fancy. Using densityplot from lattice: library(lattice) d1 = data.frame(x = rnorm(100)) d2 = data.frame(x = rnorm(100, mean = 0.5)) densityplot(~d1$x + d2$x, plot.points = FALSE) -Deepayan __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
