Compute conditional survival (chance alive) by age

Computes the conditional probability of being alive at each age x >= age0, given survival to age0, from an HMD-style period life table. For each year, the returned series is: chance_alive(x | age0) = lx(x) / lx(age0).

Usage

chance_alive(lt, pop_name, age0)

Arguments

lt

A life table tibble as returned by read_life_table(), containing at least PopName, Year, Age, and lx.

pop_name

Population code (HMD PopName) to filter within lt (e.g. "BGR", "USA", "DEUTNP").

age0

Baseline age (integer). Returned ages start at age0.

Value

A tibble with columns Year, Age, and chance_alive, sorted by Year then Age.

Examples

if (FALSE) { # \dontrun{
lt_m <- read_life_table(file.path("data", "life"), sex = "m", look_back = 10)
ca <- chance_alive(lt_m, pop_name = "BGR", age0 = 27)
ca
} # }