Inter-occasion variability (IOV) is expected to be supplied as a list with cv and n_bins specified. cv is expected to be a named list with IOV for each PK parameter. This function then checks to ensure that the PK code or ODE code contains an IOV term for each PK parameter specified.
check_iov_specification(iov, code, pk_code)
Arguments
iov: IOV specifications, provided as a nested named list.