Turn a loon size to a grid size — as_grid

The size of loon is determined by pixel (px), while, in grid graphics, the size is determined by pointsize (pt)

as_grid_size(
  size,
  type = c("points", "texts", "images", "radial", "parallel", "polygon", "lines"),
  adjust = 1,
  ...
)

Arguments

size	input `loon` size
type	glyph type; one of "points", "texts", "images", "radial", "parallel", "polygon", "lines".
adjust	a pixel (px) at 96`DPI` (dots per inch) is equal to 0.75 point. However, for different machines, the `DPI` is slightly different. Argument `adjust` is used to twist the size. IT IS A HACK and should be removed in the later version.
...	some arguments used to specify the size, e.g. `pch` for "points", `ratio` for "image" and `p` for "parallel".