histogram with density

S . Am getting error still now if i use both version of the codes .

i have to call any library?

On Tue, May 24, 2011 at 9:22 AM, Steve Lianoglou
<mailinglist.honeypot at gmail.com> wrote:

Hi,

On Mon, May 23, 2011 at 11:41 PM, Rekha <chithralekha86 at gmail.com> wrote:

Hello All,*

*I want to draw a histogram with density curve. *

*For that simply i created a data called*"x" *and i used the function
called
* ? ?hist(x, col = "blue", freq = FALSE),** ? *from this function i got
a
histogram*.

*After that , i tried this function* ?** lines(density(x), col = "red",
lwd
= 2 ?) ?*but i could not get the density curve.

So, Again i used ?other function* ? ?curve(dnorm, col = 2, add = TRUE)**
*instead of the previous function for density curve.

but still am getting error in R ?like this:

?Error in plot.xy(xy.coords(x, y), type = type, ...)
?plot.new has not been called yet"


* ?I have used below codes to have a data and histogram with density
curve"

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

You should use the code above.

I don't get it though -- this is working fine for me. Are you getting
the "plot.new" error for both versions of your code?

Although I feel like in 99% of the time this won't be necessary, but
what happens if you call `plot.new()` before your call to hist?

eg:

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

Does that work? If not -- what if you use `dev.new()` in place of
`plot.new()`?

-steve

--
Steve Lianoglou
Graduate Student: Computational Systems Biology
?| Memorial Sloan-Kettering Cancer Center
?| Weill Medical College of Cornell University
Contact Info: http://cbio.mskcc.org/~lianos/contact

--
Best Regards,
Reka.