ergm formula
and verify that it is a valid network.The function function ensures that the network in a given formula is valid; if so, the network is returned; if not, execution is halted with warnings.
ergm.getnetwork(formula, loopswarning = TRUE)whether warnings about loops should be printed
(TRUE or FALSE); defaults to TRUE.
A network object constructed by evaluating the LHS of
the model formula in the formula's environment.