gamm4
(Package: gamm4) :
Generalized Additive Mixed Models using lme4 and mgcv
Fits the specified generalized additive mixed model (GAMM) to data, by making use of the modular fitting functions provided by lme4 (new version). For earlier lme4 versions modelling fitting is via a call to lmer in the normal errors identity link case, or by a call to glmer otherwise (see lmer). Smoothness selection is by REML in the Gaussian additive case and (Laplace approximate) ML otherwise.
providing 
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