Generalized linear mixed models with flexible covariance
structures
lme4ord runs on top of the well-tested
c++ machinery from lme4
Fit models that better match the complexity of your data
with lme4ord's formula interface for specifying
flexible variance and covariance heterogeneity.
Open up new methodological vistas for your community with
lme4ord, by taking advantage of it's infrastructure
for specifying new types of covariance structures.
If you would rather specify your model as a series of
sparse matrices and updating functions, lme4ord
also provides more direct access to the underlying
lme4 machinery.