Groupwise statistics, LSmeans, linear contrasts, utilities

Groupwise Statistics, LSmeans, Linear Contrasts, Utilities
Søren Højsgaard <sorenh@math.aau.dk> and Ulrich Halekoh <uhalekoh@health.sdu.dk>
The facilities can roughly be grouped as:

1) Facilities for groupwise computations of summary statistics and
other 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.
pbkrtest (>= 0.4-3), ggplot2, multcomp, geepack, lme4

pbkrtest (>= 0.4-6), ggplot2, multcomp, geepack, lme4,
survival

doBy - Groupwise summary statistics, general linear contrasts,
population means (least-squares-means), and other utilities
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) 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@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) General linear contrasts and LSMEANS (least-squares-means also known
as population means),

3) other utilities.

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) General linear contrasts and LSMEANS (least-squares-means also
known as population means),

3) other utilities.