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