possibilitylabthemes

possibilitylabthemes provides a custom ggplot2 theme with Possibility Lab color palettes and styles.

Installation

possibilitylabthemes is still in development, but you can install the development version of possibilitylabthemes from GitHub with:

# install.packages("devtools")
devtools::install_github("Possibility-Lab/possibilitylabthemes")

Using the theme

You can set the Possibility Lab theme as the default for an R session.

library(tidyverse)
library(extrafont)
extrafont::loadfonts(device = "win")

library(possibilitylabthemes)
possibility_defaults()

ggplot(df) +
  geom_line(aes(time, price, color = index)) +
  labs(title = "Daily Closing Prices of Major European Stock Indices, 1991-1998")

To use color palettes other than the default, you can use scale_color_manual(values = possibility_palette("discrete")), for example. Palettes available can be returned by possibility_palettes.

When you wish to add more major or minor gridlines, use possibility_add_grid().

ggplot(filter(starwars, species %in% c("Human", "Droid", "Wookiee") &
                !is.na(height))) +
  geom_point(aes(height, reorder(name, height), color = species)) +
  scale_color_manual(values = possibility_palette("secondary")) +
  possibility_add_grid(add_minor = "x") +
  labs(title = "Heights of various Star Wars characters",
       y = "character")

Maps

You can set the default theme to a “map” style.

possibility_defaults("map")

ggplot(data = sf::st_intersection(
         filter(streets, !(street_typ %in% c("PATH", "TRAIL"))),
         berk)
       ) +
  geom_sf(color = "#d6d6d6") +
  geom_sf(data = routes, aes(color = type)) +
  labs(title = "Getting around Berkeley on named paths and bicycle boulevards")

Saving plots

Use possibility_save() to save plots as png files. Preset sizes - “small”, “medium”, or “large” - will save your plot at predetermined dimensions and scale all fonts and graphic elements accordingly. Choose an orientation - “horizontal” or “vertical” - depending on your chart type.

possibility_save() uses ragg::agg_png to save as a png file, which is the most suitable file format for including graphics in word documents and presentations.

possibility_save("save_destination_filepath.png",
                 x = ggplot2::last_plot(),
                 preset_size = "medium",
                 orientation = "vertical",  ## default is "horizontal"
                 dpi = 300) 

Font: Source Sans Pro

Possibility Lab uses the Source Sans Pro font. Help with installing and testing fonts will be added soon.

Citations

Thanks and credit to the urbnthemes package for inspiration and examples.