Create patterned grobs

grid.pattern() draws patterned shapes onto the graphic device. patternGrob() returns the grid grob objects. names_pattern is a character vector of builtin patterns.

grid.pattern(
  pattern = "stripe",
  x = c(0, 0, 1, 1),
  y = c(1, 0, 0, 1),
  id = 1L,
  ...,
  legend = FALSE,
  prefix = "pattern_",
  default.units = "npc",
  name = NULL,
  gp = gpar(),
  draw = TRUE,
  vp = NULL
)

names_pattern

patternGrob(
  pattern = "stripe",
  x = c(0, 0, 1, 1),
  y = c(1, 0, 0, 1),
  id = 1L,
  ...,
  legend = FALSE,
  prefix = "pattern_",
  default.units = "npc",
  name = NULL,
  gp = gpar(),
  draw = TRUE,
  vp = NULL
)

Arguments

pattern	Name of pattern. See Details section for a list of supported patterns.
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.
...	Pattern parameters.
legend	Whether this is intended to be drawn in a legend or not.
prefix	Prefix to prepend to the name of each of the pattern parameters in `...`. For compatibility with `ggpattern` most underlying functions assume parameters beginning with `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).

Format

An object of class character of length 17.

Value

A grid grob object (invisibly in the case of grid.pattern()). If draw is TRUE then grid.pattern() also draws to the graphic device as a side effect.

Details

Here is a list of the various patterns supported:

ambient: Noise array patterns onto the graphic device powered by the ambient package. See grid.pattern_ambient() for more information.
circle: Circle geometry patterns. See grid.pattern_circle() for more information.
crosshatch: Crosshatch geometry patterns. See grid.pattern_crosshatch() for more information.
gradient: Gradient array/geometry patterns. See grid.pattern_gradient() for more information.
image: Image array patterns. See grid.pattern_image() for more information.
magick: imagemagick array patterns. See grid.pattern_magick() for more information.
none: Does nothing. See grid::grid.null() for more information.
pch: Plotting character geometry patterns. See grid.pattern_pch() for more information.
placeholder: Placeholder image array patterns. See grid.pattern_placeholder() for more information.
plasma: Plasma array patterns. See grid.pattern_plasma() for more information.
polygon_tiling: Polygon tiling patterns. See grid.pattern_polygon_tiling() for more information.
regular_polygon: Regular polygon patterns. See grid.pattern_regular_polygon() for more information.
rose: Rose array/geometry patterns. See grid.pattern_rose() for more information.
stripe: Stripe geometry patterns. See grid.pattern_stripe() for more information.
text: Text array/geometry patterns. See grid.pattern_text() for more information.
wave: Wave geometry patterns. See grid.pattern_wave() for more information.
weave: Weave geometry patterns. See grid.pattern_weave() for more information.
Custom geometry-based patterns: See https://trevorldavis.com/R/gridpattern/dev/articles/developing-patterns.html for more information.
Custom array-based patterns: See https://trevorldavis.com/R/gridpattern/dev/articles/developing-patterns.html for more information.

Examples

 print(names_pattern)
#>  [1] "ambient"         "circle"          "crosshatch"      "gradient"       
#>  [5] "image"           "magick"          "none"            "pch"            
#>  [9] "placeholder"     "plasma"          "polygon_tiling"  "regular_polygon"
#> [13] "rose"            "stripe"          "text"            "wave"           
#> [17] "weave"          
 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))

   # geometry-based patterns
   # 'stripe' pattern
   grid.newpage()
   grid.pattern("stripe", x_hex, y_hex,
                colour="black", fill=c("yellow", "blue"), density = 0.5)

   # Can alternatively use "gpar()" to specify colour and line attributes
   grid.newpage()
   grid.pattern("stripe", x_hex, y_hex, gp = gpar(col="blue", fill="red", lwd=2))

   # 'weave' pattern
   grid.newpage()
   grid.pattern("weave", x_hex, y_hex, type = "satin",
                colour = "black", fill = "lightblue", fill2 =  "yellow",
                density = 0.3)

   # 'regular_polygon' pattern
   grid.newpage()
   grid.pattern_regular_polygon(x_hex, y_hex, colour = "black",
                                fill = c("blue", "yellow", "red"),
                                shape = c("convex4", "star8", "circle"),
                                density = c(0.45, 0.42, 0.4),
                                spacing = 0.08, angle = 0)

   # can be used to achieve a variety of 'tiling' effects
   grid.newpage()
   grid.pattern_regular_polygon(x_hex, y_hex, color = "transparent",
                                fill = c("white", "grey", "black"),
                                density = 1.0, spacing = 0.1,
                                shape = "convex6", grid = "hex")
   if (require("magick")) {
     # array-based patterns
     # 'image' pattern
     logo_filename <- system.file("img", "Rlogo.png" , package="png")
     grid.newpage()
     grid.pattern("image", x_hex, y_hex, filename=logo_filename, type="fit")

     # 'plasma' pattern
     grid.newpage()
     grid.pattern("plasma", x_hex, y_hex, fill="green")
   }
 }




#> Loading required package: magick
#> Linking to ImageMagick 6.9.10.23
#> Enabled features: fontconfig, freetype, fftw, lcms, pango, webp, x11
#> Disabled features: cairo, ghostscript, heic, raw, rsvg
#> Using 8 threads

Arguments

Format

Value

Details

See also

Examples