Bugfixes
- In mob() using the cluster argument with a factor variable
sometimes lead to NAs in the covariance matrix estimate if
empty categories occured in subgroups. The problem had been
introduced in version 1.2-0 and has been fixed now.
- Methods for the sctest generic from the strucchange package are
now dynamically registered if strucchange is attached.
Alternatively, the methods can be called directly using their
full names sctest.constparty and sctest.modelparty.
- The prune.modelparty function is now fully exported but it is
also registered with the prune generic from rpart.
