Hi David, I have 2 tables, each with several columns and rows of data. I am only interested in the data from column 6, which contains values in the range -PI to PI. I want to plot the data from tableD with the y axis denoting percentage with respect to tableR. So if data points in the break 2 - 3 appear half as often in tableD as in tableR, the y axis should show 50 percent. Does that make sense? I've been plotting the data like this to date:
hist(tableD[,6],ylab="frequency", xlab="angle") Thanks a lot for your help On Mon, Feb 6, 2012 at 1:31 PM, David Winsemius <dwinsem...@comcast.net> wrote: > > > On Feb 6, 2012, at 12:23 PM, Francis Keyes wrote: > >> Thanks. How do you suggest I use the reference population? Sorry, I'm new >> to R and just don't see it. If i can get a plot that is counts or density >> relative to my reference data it would be ideal. > > > It is difficult to specify "how" when we have no "what". The "what" is your > responsibility, not ours. My thought was to use the ratio of the results of > hist() on the two populations which would then be offered back to hist or > barplot. ....which (of course) requires that the 'breaks' be the same. > Provide an example of your R representations of the reference population and > tested population and all will become clear. > > (And learn to post in plain text, please.) > > -- > David Winsemius, MD > West Hartford, CT >> >> >> On Mon, Feb 6, 2012 at 1:12 AM, David Winsemius <dwinsem...@comcast.net> >> wrote: >> >> On Feb 5, 2012, at 8:31 PM, Francis Keyes wrote: >> >> With R and the hist function, is there a way to make a histogram in which >> the y axis denotes propotion with respect to a separate sample dataset of >> the same range instead of frequency? >> >> hist() returns an object with both "counts" and "density". If you had a >> reference population it should be a fairly simple matter to use one or the >> other of those. >> > > > > > ______________________________________________ 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.
