coale {demogR}

coale

Description

Utility used by life.table to graduate the person-years lived by those dying in the interval by the method of Coale and Demeny.

Usage

coale(b1, b4, nMx)

Arguments

b1

two element vector of regression coefficients for graduating 1a0 provided in Coale et al. (1983)

b4

two element vector of regression coefficients for graduating 4a1 provided in Coale et al. (1983)

nMx

period central death rates: =nDx/nKx

Details

Utility function called by life.table.

Value

The first two values (age classes 0-1 and 1-5) of the nax column of a period life table.

References

Coale, A., P. Demeny, and B. Vaughn. 1983. Regional model life tables and stable populations. 2nd ed. New York: Academic Press.

See Also

life.table

Examples

data(goodman)
vlt1 <- with(goodman, life.table(x=age, nKx=ven.nKx, nDx=ven.nDx, type="cd"))