optim within
rrvglm are set using this function.rrvglm.optim.control(Fnscale = 1, Maxit = 100,
Switch.optimizer = 3, Abstol = -Inf,
Reltol = sqrt(.Machine$double.eps), ...)optim as fnscale.optim as maxit.optim is switched to the quasi-Newton "BFGS" method.
Assigning Switch.optimizer a negative number
means always BFGS, while assigning Switch.optimizer a value
optim as abstol.optim as reltol.optim for more details.rrvglm.control,
optim.