Additional resources:

General

• The ggplot2 repository

Extending ggplot2

• The extending ggplot2 chapters of the ggplot2 book:

  • Chapter 19: Programming with ggplot2

  • Chapter 20: ggplot2 internals

  • Chapter 21: Writing ggplot2 extensions

  • Chapter 22: Case Study: Springs

• The extending ggplot2 vignette

• The ggproto tag on StackOverflow

Extensions

• The extensions gallery

• The Awesome ggplot2 repository

Talks

• Extending your ability to extend ggplot2 by Thomas Lin Pederson at rstudio::conf 2020

• Best practises for programming with ggplot2 by Dewey Dunnington at rstudio::conf 2020

• Cracking open ggplot internals with {ggtrace} by June Choe at rstudio::conf 2022