internal helper to plot contour biMAP

Usage

contour_plot(
  umap_cells,
  umap_genes,
  color_by,
  color_genes,
  colors,
  interact_genes,
  gene_size,
  gene_alpha,
  contour_n
)

umap_cells: biMAP coordinates data.frame subsetted to cells.
umap_genes: biMAP coordinates data.frame subsetted to genes.
color_by: Either "type" or "cluster". "type" colors by the type (cell or gene) while "cluster" colors by the assigned cluster. If meta_df is provided a column from the data.frame can be specified.
color_genes: logical. If TRUE colors genes by color_by.
colors: Vector of hexadecimal color codes of the same length as the categories defined by color_by or longer. If NULL ignored.
interact_genes: character string with text and labels for genes in interactive plots.
gene_size: integer. Size of the genes in the plot.
gene_alpha: numeric. Alpha value of genes (between 0 and 1).
contour_n: integer. Number of contour lines to plot.

contour plot as ggplot object.