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 ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.