doBy

Groupwise Statistics, LSmeans, Linear Contrasts, Utilities

1. Facilities for working with grouped data: 'do' something to data stratified 'by' some variables.
2. LSmeans (least-squares means), general linear contrasts.
3. Miscellaneous other utilities

Author: Søren Højsgaard, Ulrich Halekoh

CRAN page:

https://cran.r-project.org/web/packages/doBy/index.html

Further info at:

http://people.math.aau.dk/~sorenh/software/doBy/