Thanks for your work on this. Been immensely helpful for this newb.<p>One piece of advice, I would ensure QA tests include checks to make sure that the skip function works. When the ggplot package was updated, the update broke the Getting and Cleaning data module, the ggplot units. The questions were not answerable and the skip function didn&#x27;t work either.<p>You are the reason I was able to pass the R programming unit, John Hopkins Coursera. Thank you sooooo much.