Derive lifetable deaths from survivorship.

This lifetable identity is the same no matter what kind of lifetable is required. You can find it in any demography textbook.

lt_id_l_d(lx)

Arguments

lx	numeric. Vector of age-specific lifetable survivorship.

Value

ndx vector of lifetable deaths.

Details

The vector returned is the same length as lx and it sums to the lifetable radix. If the radix is one then this is the discrete deaths distribution.

References

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