On 2011-05-23 21:31, Rekha wrote:
S . Am getting error still now if i use both version of the codes .
i have to call any library?
Your code works fine for me, too, as it should.
Have you perhaps redefined the hist() function?
Do you get a histogram?
The error you quote would result if you called lines() without
opening a graphics device.
Peter Ehlers
On Tue, May 24, 2011 at 9:22 AM, Steve Lianoglou<
mailinglist.honey...@gmail.com> wrote:
Hi,
On Mon, May 23, 2011 at 11:41 PM, Rekha<chithralekh...@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
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