View source: R/pattern-geometry-wave.R
grid.pattern_wave | R Documentation |
grid.pattern_wave()
draws a wave pattern onto the graphic device.
grid.pattern_wave(
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,
amplitude = 0.5 * spacing,
frequency = 1/spacing,
alpha = gp$alpha %||% NA_real_,
linetype = gp$lty %||% 1,
linewidth = size %||% gp$lwd %||% 1,
size = NULL,
grid = "square",
type = "triangle",
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). |
amplitude |
Wave amplitude (“snpc” units) |
frequency |
Linear frequency (inverse “snpc” units) |
alpha |
Alpha (between 0 and 1) or |
linetype |
Stroke linetype |
linewidth |
Stroke linewidth |
size |
For backwards compatibility can be used to set |
grid |
Adjusts placement and density of certain graphical elements.
|
type |
Either “sine” or “triangle” (default). |
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.
Use grid.pattern_stripe()
for straight lines instead of waves.
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.newpage()
grid.pattern_wave(x_hex, y_hex, colour = "black", type = "sine",
fill = c("red", "blue"), density = 0.4,
spacing = 0.15, angle = 0,
amplitude = 0.05, frequency = 1 / 0.20)
# zig-zag pattern is a wave of `type` "triangle"
grid.newpage()
grid.pattern_wave(x_hex, y_hex, colour = "black", type = "triangle",
fill = c("red", "blue"), density = 0.4,
spacing = 0.15, angle = 0, amplitude = 0.075)
}
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