fngr                    Access a list of values separately but
                        calculate them together. This function
                        generalizes grad_share for any number of
                        functions.
grad_share              Split function and gradient calculation
lbfgs_share             Use splitfngr with lbfgs
make_share              Convert a function from multiple function
                        arguments to a single function
nlminb_share            Use splitfngr with nlminb
optim_share             Use splitfngr with optim
