grid.pattern_rose: Rose curve patterned grobs

In gridpattern: 'grid' Pattern Grobs

Rose curve patterned grobs

Description

grid.pattern_rose() draws a rose curve pattern onto the graphic device.

Usage

grid.pattern_rose(
  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,
  frequency = 0.1,
  grid = "square",
  type = NULL,
  subtype = NULL,
  rot = 0,
  alpha = gp$alpha %||% NA_real_,
  linetype = gp$lty %||% 1,
  linewidth = size %||% gp$lwd %||% 1,
  size = NULL,
  use_R4.1_masks = getOption("ggpattern_use_R4.1_masks",
    getOption("ggpattern_use_R4.1_features")),
  png_device = NULL,
  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
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).
frequency	The “angular frequency” parameter of the rose pattern.
grid	Adjusts placement and density of certain graphical elements. "square" (default) is a square grid. "hex" is a hexagonal grid suitable for hexagonal and triangular tiling. "hex_circle" is a hexagonal grid suitable for circle packing. "elongated_triangle" is a grid used for the "elongated triangle" tiling.
type	Adjusts the repeating of certain aesthetics such as color. Can use any type in names_hex, names_square, or names_weave. See for pattern_hex(), pattern_square(), and pattern_weave() for more information about supported type arguments.
subtype	See for pattern_hex(), pattern_square(), and pattern_weave() for more information about supported subtype arguments.
rot	Angle to rotate rose (degrees, counter-clockwise).
alpha	Alpha (between 0 and 1) or NA (default, preserves colors' alpha value).
linetype	Stroke linetype
linewidth	Stroke linewidth
size	For backwards compatibility can be used to set linewidth
use_R4.1_masks	If TRUE use the grid mask feature introduced in R v4.1.0. If FALSE do a rasterGrob approximation. If NULL try to guess an appropriate choice. Note not all graphic devices support the grid mask feature.
png_device	“png” graphics device to save intermediate raster data with if use_R4.1_masks is FALSE. If NULL and suggested package ragg is available and versions are high enough we directly capture masked raster via ragg::agg_capture(). Otherwise we will use png_device (default ragg::agg_png() if available else grDevices::png()) and png::readPNG() to manually compute a masked raster.
res	Resolution of desired rasterGrob in pixels per inch if use_R4.1_masks is FALSE.
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

See https://en.wikipedia.org/wiki/Rose_(mathematics) for more information.

Examples

  if (require("grid") && capabilities("png")) {
    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))
    gp <- gpar(fill = c("blue", "red", "yellow", "green"), col = "black")

    grid.newpage()
    grid.pattern_rose(x_hex, y_hex,
                      spacing = 0.15, density = 0.5, angle = 0,
                      frequency = 1:4, gp = gp)
    grid.newpage()
    grid.pattern_rose(x_hex, y_hex,
                      spacing = 0.15, density = 0.5, angle = 0,
                      frequency = 1/1:4, gp = gp)
    grid.newpage()
    grid.pattern_rose(x_hex, y_hex,
                      spacing = 0.18, density = 0.5, angle = 0,
                      frequency = c(3/2, 7/3, 5/4, 3/7), gp = gp)
  }

gridpattern documentation built on Oct. 26, 2023, 1:07 a.m.