check_model: Check that the argument 'model' is correctly specified.
Description
check_model checks that the argument 'model' is correctly specified.
Usage
check_model(model)
Arguments
model
is "GMAR", "StMAR", or "G-StMAR" model considered? In the G-StMAR model, the first M1 components
are GMAR type and the rest M2 components are StMAR type.
Value
Doesn't return anything but throws and error if something is wrong.