Returns a minimal NONMEM-style data frame that satisfies nlmixr2's data
argument requirement. All DV values are NA so nlmixr2 adds zero
log(2pi) constants to OBJF, keeping fit$objective == our -2LL exactly.
Returns a minimal NONMEM-style data frame that satisfies nlmixr2's data
argument requirement. All DV values are NA so nlmixr2 adds zero
log(2pi) constants to OBJF, keeping fit$objective == our -2LL exactly.