add_density_coloring: Color cells using a background density
In dynplot: Visualising Single-Cell Trajectories

Color cells using a background density

add_density_coloring(
  cell_positions,
  color_density = c("none", "grouping", "feature"),
  trajectory,
  grouping = NULL,
  groups = NULL,
  feature_oi = NULL,
  expression_source = "expression",
  padding = 0.1,
  nbins = 1000,
  bw = 0.2,
  density_cutoff = 0.3,
  density_cutoff_label = density_cutoff/10
)

`cell_positions`	The positions of the cells in 2D. Must be a tibble with character column `cell_id` and numeric columns `comp_1` and `comp_2`.
`color_density`	How to color density, can be "none", "grouping", or "feature".
`trajectory`	A dynwrap trajectory.
`grouping`	A grouping of the cells (e.g. clustering) as a named character vector.
`groups`	A tibble containing character columns `group_id` and `color`. If `NULL`, this object is inferred from the `grouping` itself.
`feature_oi`	The name of a feature to use for colouring the cells.
`expression_source`	Source of the feature expression, defaults to `get_expression(trajectory)`.
`padding`	The padding in the edges to the plot, relative to the size of the plot.
`nbins`	Number of bins for calculating the density.
`bw`	Bandwidth, relative to the size of the plot.
`density_cutoff`	Cutoff for density, the lower the larger the areas.
`density_cutoff_label`	Cutoff for density for labeling, the lower the further way from cells.