truehist and density plots

Consider a vector of 100 elements (attached files). then, 

truehist(b)
lines(density(b[20:50]))

How is it possible to have density plots of all subsets like b[20:50] within histogram (without exceeding the max of historgram on y axis)?

Is it more clear?

Best,

--- On Tue, 4/28/09, Uwe Ligges <ligges at statistik.tu-dortmund.de> wrote:
From: Uwe Ligges <ligges at statistik.tu-dortmund.de>
Subject: Re: [R] truehist and density plots
To: "carol white" <wht_crl at yahoo.com>
Cc: r-help at stat.math.ethz.ch
Date: Tuesday, April 28, 2009, 5:42 AM


carol white wrote:

Hi,
I wanted to plot the histogram of a vector and then, plot the density

function of subsets of the vector on the histogram. So I use truehist in MASS
package and lines(density) as follows:

length(b) = 1000
truehist(b)
lines(density(b[1:100]))

I do not undertsand what you mean. Can you please provide a *reproducible*
example?

Uwe Ligges

however the density plot of the first 100 points exceeds the max of y axis

(see attached). how is it possible to make a graphics so that the density plot
of the subsets doesn't go beyond the maximum of all points in the complete
set?

Cheers,

Carol






      

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