try this -- it scales to the maximum value: set.seed(242) z = rnorm(30) hist_z <- hist(z) hist_z$counts / hist_z$density # the relation is 15 # why is this 15 ?? # So I can now do: hist(z) # change in this statement - scale to the max y <- density(z)$y * max(hist_z$counts) / max(density(z)$y) #is what I hope to find without using hist, and only using density x <- density(z)$x lines(x = x, y = y, col = "blue", lwd = 5)
On Mon, May 23, 2011 at 10:56 AM, <richard.cot...@hsl.gov.uk> wrote: > > > In order to do this I can use the relation between count and density, but > I > > would like to know if there is a way for me to predict it upfront. > In the code for hist.default, you'll see the line > dens <- counts/(n * diff(breaks)) > > Here is an example: > > > > set.seed(242) > > z = rnorm(30) > > hist_z <- hist(z) > > hist_z$counts / hist_z$density # the relation is 15 > In your example, n is 30, and the breaks are evenly spaced every 0.5. > Regards, > Richie. > Mathematical Sciences Unit > [1]HSL > [2]4D Pie Charts > _________________________________________________________________ > > ATTENTION: > > > > This message contains privileged and confidential information intended for > the addressee(s) only. If this message was sent to you in error, you must > not disseminate, copy or take any action in reliance on it and we request > that you notify the sender immediately by return email. > > > > Opinions expressed in this message and any attachments are not necessarily > those held by the [3]Health and Safety Laboratory or any person connected > with the organisation, save those by whom the opinions were expressed. > > > > Please note that any messages sent or received by the [4]Health and Safety > Laboratory email system may be monitored and stored in an information > retrieval system. > _________________________________________________________________ > > Think before you print - do you really need to print this email? > _________________________________________________________________ > _________________________________________________________________ > > Scanned by MailMarshal - Marshal's comprehensive email content security > solution. Download a free evaluation of MailMarshal at [5]www.marshal.com > _________________________________________________________________ > > References > > 1. http://www.hsl.gov.uk/contact-us.htm > 2. http://4dpiecharts.com/ > 3. http://www.hsl.gov.uk/ > 4. http://www.hsl.gov.uk/ > 5. http://www.marshal.com/ > ______________________________________________ > 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. > -- Jim Holtman Data Munger Guru What is the problem that you are trying to solve? ______________________________________________ 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.
