draw horizontal and vertical polygons

draw_polygon(
  vals,
  x = NULL,
  type = "horizontal",
  length.out = 10000,
  col.regions = c("blue", "red"),
  alpha = 0.6,
  zlim = c(-Inf, Inf),
  ...
)

Arguments

vals: numeric vector
x: The corresponding x position of vals
type: one of "horizontal" or "vertical"
length.out: the length of interpolated vals and x
col.regions: A vector of colors, or a function to produce a vecor of colors, to be used if region=TRUE. Each interval defined by at is assigned a color, so the number of colors actually used is one less than the length of at. See level.colors for details on how the color assignment is done.
alpha: the alpha of polygon's fill color
zlim: limits of vals
...: Extra parameters.

Examples

set.seed(1)
y <- rnorm(10)
x <- seq_along(y)