[R] Mapping 2D to 3D

H @gent@ @end|ng |rom medd@t@|nc@com
Sat Sep 19 02:25:10 CEST 2020

On 09/18/2020 03:08 AM, Carlos Ortega wrote:
> 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 using meddatainc.com <mailto:agents using 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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Yes, these are two of the links I found but unfortunately they do not explain enough. In the second link there is the reference to an internal dataframe etc. but I can still not figure out how to specify a z-variable of my choosing when I am creating this type of plot...

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