Juan Natera - Highlights of useR conference - LA R meetup - Sep 2014

Transcript

1. A short introduction to dplyr Juan Natera Los Angeles R Meetup 09/04/2014
2. A bit about me • Software Engineer • Interested in R and its use for gaining insights about data • Open Source enthusiast • Baseball fanatic
3. About dplyr • Developed by Hadley Wickham, Chief Scientist @ Rstudio. • Part of a suite of packages meant to facilitate working on the “data pipeline”.
4. Why? • People spend a lot of time getting data ready for analysis • Almost no learning curve (just need to learn 5 verbs) • Improves readability • It's FAST
5. The data pipeline Tidy Transform Model Visualize
6. The 5 verbs • flter: remove rows • select: choose columns • arrange: reorder rows • mutate: change data • summarize: guess...
7. No learning curve, how? • First parameter is always a data.frame • Other parameters describe what you want to do with it. • Always returns a new data.frame
8. It's Fast
9. Let's see some code!
10. A great book I picked up at useR 2014
11. Questions or Comments? naterajj@gmail.com