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.

I wrote an introductory blog post about how to access and analyze Pew Research Center survey data with R, a free, open-source software for statistical analysis. The post showed how to perform tasks ...

Pew Research Center releases its survey data publicly as IBM SPSS files with the .sav extension. But if you don’t have access to SPSS, there are free, open-source tools available to analyze and make ...