R: Vignettes and other documentation

# Vignettes and other documentation

## Vignettes from package 'doBy'

doBy::doby |  | doby: Groupwise computations and miscellaneous utilities | HTML | source | R code
doBy::pipe_arithmetic |  | Pipe-friendly Arithmetic Helpers in doBy | HTML | source |
doBy::sectioning_fun |  | section_fun: Section functions to a smaller domain | HTML | source | R code
doBy::vtools |  | Working with vtools: Flexible Variable Selection | HTML | source |