doBy
A utility package: Groupwise Statistics, LSmeans, Linear Contrasts, Utilities
- Facilities for working with grouped data: ‘do’ something to data stratified ‘by’ some variables.
 
- Linear estimates and LSmeans (marginal means)
 
- Functional programming
 
- Pipe arithmetic
 
- Flexible variable selection
 
- Miscellaneous datasets
 
Author: Søren Højsgaard, Ulrich Halekoh