Add a

Add a "polygons" layer to a Bokeh figure

ly_polygons(
  fig,
  xs,
  ys,
  group = NULL,
  data = figure_data(fig),
  color = NULL,
  alpha = 1,
  hover = NULL,
  url = NULL,
  lname = NULL,
  lgroup = NULL,
  ...
)

Arguments

fig	figure to modify
xs	vector or list of values or field name of polygon x coordinates - see details
ys	vector or list of values or field name of polygon y coordinates - see details
group	vector or field name of grouping variable - see details
data	an optional data frame, providing the source for inputs xs, ys, group, and other glyph properties
color	color for the glyph - a hex code (with no alpha) or any of the 147 named CSS colors, e.g 'green', 'indigo' - for glyphs with both fill and line properties, see "Handling color" below
alpha	the alpha transparency of the glyph between 0 (transparent) and 1 (opaque) - if glyph has both fill and color properties, see "Handling alpha" below
hover	a data frame of variables to be displayed when hovering over the glyph or a vector of variable names that can be found and extracted from the `data` argument
url	a string of URLs or a single string that references a variable name (via @var_name) that can be found and extracted from the `data` argument
lname	layer name
lgroup	layer group
...	additional parameters for fine control over fill and line properties (see "Additional parameters" below)

Details

xs and ys can be a list of vectors, each element for one polygon to be drawn, or can be vectors with the group argument specifying how to break them up into individual polygons.

Handling color

The color parameter is a high-level plot attribute that provides default behavior for coloring glyphs.

When using a glyph that only has line properties, this will be the color of the line.
When using a glyph that has has line and fill properties, this will be the color of the line and the fill, with the alpha level of the fill reduced by 50%.
If full control over fill and line color is desired, the fill_color and line_color attributes can be specified explicitly and will override color.

When color is NULL and fill_color or line_color are not specified, the color will be chosen from the theme.

Handling alpha

The alpha is a high-level plot attribute that sets the transparency of the glyph being plotted.

When using a glyph that only has line properties, this will be the alpha of the line.
When using a glyph that has has line and fill properties, this will be the alpha of the line and the alpha of the fill will be set to 50% of this value.
Individual fill and line alpha can be specified with fill_alpha and line_alpha and will override alpha.

Additional parameters