See how to join two data sets by one or more common columns using base R’s merge function, dplyr join functions, and the speedy data.table package. R has a number of quick, elegant ways to join data ...

R imports files is when the program reads an external file into memory and uses it in code to perform different manipulations and calculations. There are two different ways of doing this - using the ...

A behind-the-scenes blog about research methods at Pew Research Center. For our latest findings, visit pewresearch.org. (Related posts: Introducing pewmethods: An R package for working with survey ...