R is a free and powerful statistical software package that is capable of advanced statistical analysis. Since R requires the user to write computer code to execute commands, the researcher’s ability ...

The book “Advanced R, 2nd Edition” by Hadley Wickham (CRC Press) came out in 2019 with much fanfare. Wickham is an internationally recognized R guru, Chief Scientist at RStudio and a member of the R ...

Combining multiple datasets, whether by stacking or joining, is commonly necessary as is changing the shape of data. The plyr and reshape2 packages offer good functions for accomplishing this in ...