Tidy Data in R

Examples in this presentation are mostly from Rstudio help and online materials. No copyright is claimed.

• History of tidyr and dplyr package
• Tidy data with tidyr
• Transform data with dplyr (not today)

• About Tidyr.

reshape \( \Longrightarrow \) reshape2 \( \Longrightarrow \) tidyr.
All three packages are developed by Hadley Wickham.

• About dplyr

• read http://blog.rstudio.org/2014/07/22/introducing-tidyr/

• read http://cran.r-project.org/web/packages/tidyr/vignettes/tidy-data.html

• keep http://www.rstudio.com/wp-content/uploads/2015/02/data-wrangling-cheatsheet.pdf