Plasma patterned grobs

grid.pattern_plasma() draws a plasma pattern onto the graphic device.

grid.pattern_plasma(
  x = c(0, 0, 1, 1),
  y = c(1, 0, 0, 1),
  id = 1L,
  ...,
  fill = gp$fill %||% "grey80",
  scale = 1,
  alpha = gp$alpha %||% NA_real_,
  aspect_ratio = 1,
  key_scale_factor = 1,
  res = getOption("ggpattern_res", 72),
  default.units = "npc",
  name = NULL,
  gp = gpar(),
  draw = TRUE,
  vp = NULL
)

Arguments

x

A numeric vector or unit object specifying x-locations of the pattern boundary.

y

A numeric vector or unit object specifying y-locations of the pattern boundary.

id

A numeric vector used to separate locations in x, y into multiple boundaries. All locations within the same id belong to the same boundary.

...

Currently ignored.

fill

Colour.

scale

Extra scaling

alpha

Alpha (between 0 and 1) or NA (default, preserves colors' alpha value).

aspect_ratio

Override aspect ratio.

key_scale_factor

Additional scale factor for legend.

res

Assumed resolution (in pixels per graphic device inch) to use when creating array pattern.

default.units

A string indicating the default units to use if x or y are only given as numeric vectors.

name

A character identifier.

gp

An object of class "gpar", typically the output from a call to the function gpar. This is basically a list of graphical parameter settings.

draw

A logical value indicating whether graphics output should be produced.

vp

A Grid viewport object (or NULL).

Value

A grid grob object invisibly. If draw is TRUE then also draws to the graphic device as a side effect.

See also

grid.pattern_ambient() provides a noise pattern using the ambient package. Pseudorandom seeds for the plasma pattern may be set via magick::magick_set_seed().

Examples

  if (requireNamespace("magick")) {
    x_hex <- 0.5 + 0.5 * cos(seq(2 * pi / 4, by = 2 * pi / 6, length.out = 6))
    y_hex <- 0.5 + 0.5 * sin(seq(2 * pi / 4, by = 2 * pi / 6, length.out = 6))
    grid.pattern_plasma(x_hex, y_hex, fill = "green")
  }