R/pk.calc.simple.R
pk.calc.cstart.RdDetermine the concentration at the beginning of the interval
pk.calc.cstart(conc, time, start)The concentration when time == end. If none match, then NA
Other NCA parameters for concentrations during the intervals:
pk.calc.clast.obs(),
pk.calc.cmax(),
pk.calc.count_conc(),
pk.calc.ctrough()