Mapping 2D to 3D
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 <agents at 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...
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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??