gg.layers

Installation

You can install the development version of gg.layers from GitHub with:

# install.packages("remotes")
remotes::install_github("rpkgs/gg.layers")

Document

• https://ggplot2-book.org/programming.html

• https://ggplot2-book.org/extensions.html

Example

self-made colorbar

https://stackoverflow.com/questions/68440366/how-can-i-add-triangles-to-a-ggplot2-colorbar-in-r-to-indicate-out-of-bound-valu

library(gg.layers)
#> Registered S3 method overwritten by 'gg.layers':
#>   method       from  
#>   print.gtable gtable
library(ggplot2)
library(rcolors)

brk <- c(-Inf, -1, 0, 1, 3, 6, 9, Inf)
nbrk <- length(brk) - 1
cols <- get_color(rcolors$amwg256, nbrk)

g <- make_colorbar(
  at = brk, col = cols, height = 1,
  tck = 0.4,
  space = "right",
  legend.text.location = c(0.3, 0.5),
  legend.text.just = c(0.5, 0.5),
  # legend.text = list(fontfamily = "Times", cex = 1.1),
  hjust = 0.05
)
p <- ggplot(mtcars %>% subset(cyl == 4), aes(mpg, disp)) + geom_point() + 
    facet_wrap(~cyl) + 
    theme(legend.position = "none")
p + g

significant regions

data("d_trendPerc")
d_mask <- mutate(d_trendPerc, mask = perc <= 0.99) # %>% as.data.frame()

# 1. geom_signPoint
ggplot(data = d_mask, aes(x, y)) +
  geom_raster(aes(fill = perc)) +
  geom_signPoint(aes(mask = !mask), fact = 2, shape = 4)

# 2. geom_signHatch
ggplot() +
  geom_raster(data = d_trendPerc, aes(x, y, fill = perc)) +
  # geom_sf(data = shp) +
  geom_signHatch(data = d_mask, aes(x, y, mask = mask), color = "red")

# 3. stat_signPattern
ggplot() +
  geom_raster(data = d_trendPerc, aes(x, y, fill = perc)) +
  stat_signPattern(
    data = d_mask, aes(x, y, mask = mask),
    fill = "transparent", color = "red",
    pattern_density = 0.02
  )