If the concentrations or times are invalid, will provide an error. Reasons for being invalid are
time
is not a number
conc
is not a number
Any time
value is NA
time
is not monotonically increasing
conc
and time
are not the same length
check.conc.time(conc, time, monotonic.time = TRUE)
None
Measured concentrations
Time of the measurement of the concentrations
Must the time be unique and monotonically increasing?
Some cases may generate warnings but allow the data to proceed.
A negative concentration is often but not always an error; it will generate a warning.