Re: [R] trying to superimpose a line plot onto a histogram

From: Edwin Lei <unlucky24_at_hotmail.com>
Date: Sat, 05 Jul 2008 13:29:08 -0700

Thanks for the quick response. But the points I'm trying to superimpose isn't exactly the density of the data. Is there any other way to do it?  

From: milton ruser [mailto:milton.ruser_at_gmail.com] Sent: July 5, 2008 6:56 AM
To: Edwin Lei
Cc: r-help_at_r-project.org
Subject: Re: [R] trying to superimpose a line plot onto a histogram  

How about the answer by Demitris?  

Regards a lot,  

miltinho


From: Dimitris Rizopoulos <dimitris.rizopoulos_at_med.kuleuven.be> Date: Jun 16, 2008 4:05 AM
Subject: Re: [R] Superimposing Line over Histogram in Density Plot To: Gundala Viswanath <gundalav_at_gmail.com> Cc: r-help_at_stat.math.ethz.ch

try something like this:

x <- rnorm(200)
hist(x, col = "blue", freq = FALSE)
lines(density(x), col = "red", lwd = 2)  

On 7/5/08, Edwin Lei <unlucky24_at_hotmail.com> wrote:

Hello,

I'm trying to superimpose a line plot onto a histogram but I'm not having any luck. I've attached the dataset. What I did was:

> hist(data,freq=F)

Now I'm trying to superimpose the following points with a line connecting them onto the histogram:

x y

100  0.535665393824959
200  0.212744329736556
300  0.0844933242968584
400  0.0335572838043417
500  0.0133275771274986
600  0.00529316714442912
700  0.0021022289461042
800  0.000834919136549392
900  0.000331595645597124
1000 0.000131696193518099
1100 5.2304327929049e-05
1200 2.07731343406939e-05

Basically, the x values correspond to the break points in the histogram. Next I used the command

> points(x,y,type="l")

But for some reason, the line plot is shifted to the right and doesn't line up with the histogram.

Thanks for the help!

Edwin Lei



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