Longitudinal

Oswald, developed by the Statistics Group at the University of Lancaster, is a suite of S-plus functions for analysing longitudinal data. The features it currently provides include:
Data structures for single time series and associated operations
Data structures for balanced and unbalanced collections of time series, with operations for:

• Mathematical operations, selection, and comparison
• Printing and Plotting
• Interactive graphics

Analysis methods:

• Ordinary least squares analysis
• Kernel smoothing with cross-validation
• Variogram analysis
• Parametric modelling of covariance structure with REML estimation
• Informative dropout models
• GEE and ALR analysis
• Mixed-effects models

For more information, see: http://www.maths.lancs.ac.uk/Software/Oswald/

Usage:
library(Oswald)