Determine standardized rxode2 column names from data
getStandardColNames(data)
A named character vector where the names are the standardized names
and the values are either the name of the column from the data or NA
if the column is not present in the data.
getStandardColNames(data.frame(ID=1, DV=2, Time=3, CmT=4))
#> id time amt rate dur evid cmt ss ii addl dv
#> "ID" "Time" NA NA NA NA "CmT" NA NA NA "DV"
#> mdv dvid cens limit
#> NA NA NA NA