This book has been developed in the open, and it wouldn’t be nearly as good without your contributions. There are a number of ways you can help make the book even better:
If you don’t understand something, please let me know. Your feedback on what is confusing or hard to understand is valuable.
If you spot a typo, feel free to edit the underlying page and send a pull request. If you’ve never done this before, the process is very easy:
Click the edit this page on the sidebar
Make the changes using github’s in-page editor and save.
Submit a pull request including a brief description of your changes: fixing typos is perfectly adequate.
If you make significant changes, include the phrase “I assign the copyright of this contribution to Hadley Wickham” - I need this so I can publish the printed book.