grid.pattern_plasma()
draws a plasma pattern onto the graphic device.
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
ory
are only given as numeric vectors.- name
A character identifier.
- gp
An object of class
"gpar"
, typically the output from a call to the functiongpar
. 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")
}