Start here to learn R
All the tutorials involve using base R packages. While OK for a tutorial, <i>this is not reflective for real-world data analysis</i> both in performance and usability, a lesson I have learned the hard way. (After using it for three semesters in college, I almost quit R completely in frustration)<p>I recommend going straight to the Hadleyverse packages for the common use cases, and read the vignettes for the common use cases: readr for reading files, dplyr for manipulating data, ggplot2 for plotting (the most important package!), and tidyr for reshaping data into a ggplot2-friendly long form.<p>Wickham himself has a very beginner-friendly, free book for learn R using his packages: <a href="http://r4ds.had.co.nz/index.html" rel="nofollow">http://r4ds.had.co.nz/index.html</a> (far better than any tutorial I could write)