nca.cal: Derive Common NCA parameters using single and multiple...
In leonpheng/lhtool:

nca.cal()

nca.cal(data, n_lambda = 3, id = "id", time = "time", dv = "dv",
  sort.by = NULL, ss.variable = "ss", sd_label_in_ss = NULL,
  ss_label_in_ss = NULL, tau = NULL, dose = NULL,
  partialAUC = NULL, partialConc = NULL)

`data`	datset or data frame (ex:data=PKdatat)
`n_lambda`	number of points for estimating the Lambda
`id`	unique subject identifier
`time`	Sampling time after dose (TAD)
`dv`	Concentration
`tau`	Dose interval. As vector or numeric.
`dose`	Dose administered. As vector or numeric. Required to estimate CL and Vss
`partialAUC`	Time interval for partial AUC. Ex: c(0,6,0,12,6,12) for AUC0-6, AUC0-12 and AUC6-12
`partialConc`	Concentration at particular time (Ex:c(1,4) for concentration after 1 and 4 h)
`dosing.regimen`	PK profile profile flag (ex: single, sd, md ,ss).As vector or numeric. Note that only one prefile per dose is to be analyzed.
`label.for.sd`	Label to identify sd profile used in dosing.regimen. Need to compute the effective half-life
`label.for.ss`	Label to identify ss profile used in dosing.regimen. Need to compute the effective half-life

1 2	p<-nca.cal(data=data, n_lambda = 3, id = "id", time = "time", dv = "dv", tau="ii",dose="dose",dosing.regimen = "ss",label.for.sd="single", partialAUC = NULL, partialConc = NULL)