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title: Contributing

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# Contributing

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](mailto:[email protected]). 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 and include 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.