Re: [R] histogram with density

From: Rekha <chithralekha86_at_gmail.com>
Date: Tue, 24 May 2011 10:01:15 +0530

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@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.


*

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Received on Tue 24 May 2011 - 04:33:24 GMT

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