lmmspline class a S4 class that extends lmms class.
lmmspline class inherits from class
lmms and extends it with three further slots:
models. The class is returned when applying
data.framereturning the fitted values for the time points of interest.
lmecontaining the models for every molecule
lme, containing the models used to model the particular feature of interest.
logicalvalue indicating if the derivative was calculated.