Derive lifetable survivorship (lx) from death probabilities.

Source: R/lt_id.R

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)

Arguments

nqx

numeric. Vector of age specific death probabilities.
radix

numeric. The lifetable starting population. Default 100000.

Value

lx vector of lifetable survivorship.

Details

#' @export #' @rdname lt_id_ma_q mxax2qx <- lt_id_ma_q

set 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.

References

Preston S, Heuveline P, Guillot M (2000). Demography: measuring and modeling population processes. Wiley-Blackwell.