This lifetable identity is the same no matter what kind of lifetable is required. You can find it in any demography textbook.
lt_id_q_l(nqx, radix = 1e+05)
numeric. Vector of age specific death probabilities.
numeric. The lifetable starting population. Default 100000.
lx vector of lifetable survivorship.
#' @export #' @rdname lt_id_ma_q mxax2qx <- lt_id_ma_q
radix = 1 for the probability of surviving until age x. The vector returned is
the same length as
nqx, thereby throwing out the final value of qx, which is usually set to 1.
Preston S, Heuveline P, Guillot M (2000). Demography: measuring and modeling population processes. Wiley-Blackwell.