Annotate a shaded panel region — panel

A convenience wrapper around panel_background() with a smart shade default which blends the panel background fill with jumble::slate at 25% opacity with no border. Should be placed before geom layers.

Usage

panel_shade(
  xmin = -Inf,
  xmax = Inf,
  ymin = -Inf,
  ymax = Inf,
  fill = NULL,
  alpha = 0.2,
  colour = "transparent",
  linewidth = NULL,
  linetype = 1,
  layout = NULL
)

Arguments

xmin, xmax: Left and right edges of the rectangle in data coordinates. Defaults to -Inf and Inf. Use I() for normalised coordinates (0-1). May be a vector for multiple rectangles. Bounds may be mixed freely, e.g. xmin = I(0.5), xmax = Inf fills from 50% to the right panel edge.
ymin, ymax: Bottom and top edges of the rectangle in data coordinates. Defaults to -Inf and Inf. Use I() for normalised coordinates (0-1). May be a vector for multiple rectangles.
fill: Fill colour.
alpha: Opacity. Defaults to 0.2. May be a vector.
colour: Border colour. Defaults to "transparent". May be a vector.
linewidth: Inherits from panel.border in the set theme. Supports rel(). May be a vector.
linetype: Border linetype. Defaults to 1. May be a vector.
layout: Controls which panels the annotation appears in. NULL (default) repeats in all panels. An integer targets a specific panel. "fixed" repeats in all panels ignoring faceting variables. See ggplot2::layer() for full details.

Value

A list containing annotation layers.