grid.pattern_circle()
draws a circle pattern onto the graphic device.
grid.pattern_circle( x = c(0, 0, 1, 1), y = c(1, 0, 0, 1), id = 1L, ..., colour = gp$col %||% "grey20", fill = gp$fill %||% "grey80", angle = 30, density = 0.2, spacing = 0.05, xoffset = 0, yoffset = 0, alpha = gp$alpha %||% NA_real_, linetype = gp$lty %||% 1, size = gp$lwd %||% 1, grid = "square", type = NULL, subtype = NULL, default.units = "npc", name = NULL, gp = gpar(), draw = TRUE, vp = NULL )
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 |
... | Currently ignored |
colour | Stroke colour |
fill | Fill colour |
angle | Rotation angle in degrees |
density | Approx. fraction of area the pattern fills. |
spacing | Spacing between repetitions of pattern ('snpc' units between 0 and 1). |
xoffset | Shift pattern along x axis ('snpc' units between 0 and 1). |
yoffset | Shift pattern along y axis ('snpc' units between 0 and 1). |
alpha | Alpha (between 0 and 1) or |
linetype | Stroke linetype |
size | Stroke linewidth |
grid | Adjusts placement and density of certain graphical elements.
|
type | Adjusts the repeating of certain aesthetics such as color.
Can use any type in |
subtype | See for |
default.units | A string indicating the default units to use if |
name | A character identifier. |
gp | An object of class |
draw | A logical value indicating whether graphics output should be produced. |
vp | A Grid viewport object (or NULL). |
A grid grob object invisibly. If draw
is TRUE
then also draws to the graphic device as a side effect.
See grid.pattern_regular_polygon()
for a more general case of this pattern.
if (require("grid")) { 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_circle(x_hex, y_hex, fill = c("blue", "yellow"), density = 0.5) grid.newpage() grid.pattern_circle(x_hex, y_hex, density = 0.8, grid = "hex_circle", gp = gpar(fill = c("blue", "yellow", "red"))) grid.newpage() grid.pattern_circle(x_hex, y_hex, density = 1.2, grid = "hex_circle", gp = gpar(fill = c("blue", "yellow", "red"))) # using a "twill_zigzag" 'weave' pattern grid.newpage() grid.pattern_circle(x_hex, y_hex, fill = "blue", density = 0.5, type = "twill_zigzag") }![]()
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