Mapping 2D to 3D

Hi,

There are some further references in the own "RStudio Community" and in StackOverflow:

  * https://community.rstudio.com/t/options-to-stat-density-2d/792/4
  * https://stackoverflow.com/questions/32206623/what-does-level-mean-in-ggplotstat-density2d

Kind Regards,
Carlos.


On Fri, Sep 18, 2020 at 4:17 AM H <agents at meddatainc.com <mailto: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...