Søren Højsgaard <sorenh@mail.dk> and Ulrich Halekoh <Ulrich.Halekoh.agrsci.dk> with contributions from Jim Robison-Cox, Kevin Wright and Alessandro A. Leidi.
doBy contains a variety of utilities including: 1) Facilities for groupwise computations of summary statistics and other facilities for working with grouped data. 2) General linear contrasts and LSMEANS (least-squares-means also known as population means), 3) Rscript2HTML for autmatic generation of HTML file from R-script with a minimum of markup, 4) implementation of the Kenward-Roger method for estimating denominator degrees of freedom various for tests in linear mixed models, 5) methods for determining p-values based on parametric bootstrap in linear mixed models 6) other utilities. doBy originally contained facilities for 'doing something to data where data would be partitioned by some variables which define groupings of data' - hence the name doBy.

Søren Højsgaard <sorenh@mail.dk> and Ulrich Halekoh
<Ulrich.Halekoh.agrsci.dk> with contributions from Jim
Robison-Cox, Kevin Wright and Alessandro A. Leidi.

doBy - Groupwise summary statistics, LSmeans, general linear
contrasts, various utilities
Søren Højsgaard <sorenh@math.aau.dk> and Ulrich Halekoh <Ulrich.Halekoh@agrsci.dk> with contributions from Jim Robison-Cox, Kevin Wright and Alessandro A. Leidi.
doBy originally contained facilities to 'do something' to data where data is partitioned 'by' some variables
which define groupings of data - hence the name doBy. doBy contains a
variety of utilities including:

1) Facilities for groupwise computations of summary statistics and
other facilities for working with grouped data.

2) LSmeans (least-squares means), general linear contrasts.

3) Miscellaneous other utilities.
pbkrtest (>= 0.3-8), ggplot2, multcomp, geepack

Søren Højsgaard <sorenh@math.aau.dk> and Ulrich Halekoh <uhalekoh@health.sdu.dk> with contributions from Jim Robison-Cox, Kevin Wright, Alessandro A. Leidi and others.
doBy originally contained facilities to 'do' something to data stratified 'by' some variables. doBy contains a
variety of utilities including:

1) Facilities for groupwise computations of summary statistics and
other facilities for working with grouped data.

2) LSmeans (least-squares means), general linear contrasts.

3) Miscellaneous other utilities.
pbkrtest (>= 0.3-8), ggplot2, multcomp, geepack, lme4