Logo image and layout.

logo_image() places an image on the drawing canvas. This function is not intended to be used on its own, but instead should be added to a ggplot2 plot to add a logo to the plot. logo_layout() arranges the plot and image so that the image is in the bottom right. The default layout can be overridden if, for example, you are adding a logo to a patchwork of multiple plots.

Sets up the layout for a plot combined with a logo image.

logo_image(
  image = system.file("SageBionetworks-Logo.png", package = "sagethemes")
)

logo_layout(ncol = 1, heights = c(1, 0.1), design = "AAAAAA\n####BB", ...)

Arguments

image	Path to image file to be added
ncol	The dimensions of the grid to create - if both are NULL it will use the same logic as facet_wrap() to set the dimensions
heights	The relative widths and heights of each column and row in the grid. Will get repeated to match the dimensions of the grid.
design	Specification of the location of areas in the layout. Can either be specified as a text string or by concatenating calls to area() together. See the examples for further information on use.
...	Additional parameters passed to patchwork::plot_layout()

Examples

library("ggplot2")
library("patchwork")
#> Warning: package ‘patchwork’ was built under R version 4.0.2

ggplot(mpg, aes(displ, hwy, colour = class)) +
  geom_point() +
  logo_image() +
  logo_layout()


# When adding logos to more complex figures, you may want to customize
# logo_layout() (or use patchwork::plot_layout() directly)

p1 <- ggplot(mtcars) +
  geom_point(aes(mpg, disp))

p2 <- ggplot(mtcars) +
  geom_boxplot(aes(gear, disp, group = gear))

p3 <- ggplot(mtcars) +
  geom_point(aes(hp, wt, colour = mpg))

p1 + p2 + p3 +
  logo_image() +
  logo_layout(ncol = 3, nrow = 2, design = "AABBCC\n####DD")


# By default, the logo size will scale as you resize the plotting window. You
# can instead choose to keep its size constant and let only the plot size
# scale:

ggplot(mpg, aes(displ, hwy, colour = class)) +
  geom_point() +
  logo_image() +
  logo_layout(heights = unit(c(1, 1), c('null', 'cm')))