If Tlast is NA (due to no non-missing above LOQ measurements), this will return NA.
pk.calc.clast.obs(conc, time, check = TRUE)The last observed concentration above the LOQ
Concentration measured
Time of concentration measurement
Run check.conc.time?
Other NCA parameters for concentrations during the intervals:
pk.calc.cmax(),
pk.calc.cstart(),
pk.calc.ctrough()