This is the code for the [Introduction to Data Science](https://rafalab.github.io/dsbook/) class notes used in the [HarvardX Data Science Series](https://www.edx.org/course/data-science-r-basics-harvardx-ph125-1x). We will be adding chapters during the next few months. For updates follow @rafalab This work is licensed under the [Creative Commons Attribution-NonCommercial-NoDerivs 3.0](http://creativecommons.org/licenses/by-nc-nd/3.0/us/) United States License.