The Data Import cheat sheet reminds you how to read in flat files with http://readr.tidyverse.org/, work with the results as tibbles, and reshape messy data with tidyr. Use tidyr to reshape your tables into tidy data, the data format that works the most seamlessly with R and the tidyverse.
The Latest Resources
RStudio IDE Cheat Sheet
The RStudio IDE is the most popular integrated development environment for R.
Shiny Cheat Sheet
This cheat sheet provides a tour of the Shiny package and explains how to build and customize an interactive app.
R Markdown 2.0 Cheat Sheet
R Markdown is an authoring format that makes it easy to write reusable reports with R.
Apply Functions Cheat Sheet
The purrr package makes it easy to work with lists and functions.
Work with Strings Cheat Sheet
The stringr package provides an easy to use toolkit for working with strings, i.e. character data, in R.
Package Development Cheat Sheet