On 09/18/2020 02:26 AM, Jeff Newmiller wrote: > No, but fortunately you are off in the weeds. Density has an > internally-computed "z" coordinate... you should be looking at ?geom_contour. > > On September 17, 2020 7:17:33 PM PDT, H <age...@meddatainc.com> wrote: >> I am trying to understand how to map 2D to 3D using ggplot() and >> eventually plot_gg(). I am, however, stuck on understanding how to >> express the third variable to be mapped. This example: >> >> ggdiamonds = ggplot(diamonds, aes(x, depth)) + >> stat_density_2d(aes(fill = stat(nlevel)), >> geom = "polygon", n = 100, bins = 10,contour = TRUE) + >> facet_wrap(clarity~.) + >> scale_fill_viridis_c(option = "A") >> >> uses a variable nlevel that I now understand is calculated during the >> building of the ggplot but I have not figured out from where it is >> calculated or how to specify a variable of my choosing. >> >> Does anyone have a good reference for understanding how to specify this >> variable? Most examples on the 'net seem to use the same dataset but do >> not specify this particular aspect... >> >> ______________________________________________ >> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see >> 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.
But looking at the code in my message above, how does one know what stat(nlevel) refers to? What if I wanted to map another variable in this particular dataset?? ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
