Create a graphical object from a logo file

The gglogo() function creates a grob (a grid graphical object) from a logo file. This grob can be combined with a ggplot2 plot object.

gglogo(
  logo,
  file = logo_file_path(logo),
  x = 0.04,
  y = 0.96,
  just = c("left", "top"),
  ...
)

Arguments

logo: Name of a logo available in gouvdown. The list of available logos can be obtained with list_logos().
file: Path to a png file.
x, y: x and y positions of the logo relative to the border. Since these arguments are passed to grid::rasterGrob(), unit objects are allowed.
just: The justification of the rectangle relative to its (x, y) location. If there are two values, the first value specifies horizontal justification and the second value specifies vertical justification. Possible string values are: "left", "right", "centre", "center", "bottom", and "top". For numeric values, 0 means left alignment and 1 means right alignment.
...: Other arguments passed to grid::rasterGrob().

Value

An object of class "grob".

Details

Fill either logo or file parameter: an error is thrown if both parameters are provided.

Examples

library(grid)

header <- gglogo("marianne", x = 0, y = 1)
vp <- viewport(x = 0.22, y = 0.78, width = 0.2, height = 0.2, just = c("right",
    "bottom"))
pushViewport(vp)
grid.draw(header)