[R] Question about density()

[Dan Bolser]

If I integrate over the result of the density() funcion, is the result 1?

For example 

x <- rnorm(1000)
plot(density(x))

Does the area under the curve I see sum to 1?


What I really want to know is if I can directly compare two particular
curves, generated like this


x <- rnorm(1000)
plot(density(x))

a.seq <- seq(min(x),max(x),0.01)
lines(a.seq,dnorm(x=a.seq,mean=mean(x),sd=sd(x)))


I guess they are directly comparable if the area under density sums to
one.

Is this correct?