stat-density2d.md
In ggplot2: Create Elegant Data Visualisations Using the Grammar of Graphics

stat_density2d can produce contour and raster data

Problem while computing stat.
i Error occurred in the 1st layer.
Caused by error in `compute_layer()`:
! `contour_var` must be one of "density", "ndensity", or "count", not "abcd".

stat_density_2d handles faulty bandwidth

Computation failed in `stat_density2d()`.
Caused by error in `precompute_2d_bw()`:
! The bandwidth argument `h` must contain numbers larger than 0.
i Please set the `h` argument to stricly positive numbers manually.