ft.4p {vitality}

Density function for 3-parameter (r, s, u)

Description

This function is used in the calculation of the fitted intrinsic (mu.vd1.4p) and total (mu.vd.4p) mortality rate in the 4-parameter model.

Usage

  ft.4p(xx, r, s, u)

Arguments

xx

age

r

r value

s

s value

u

u value

Value

density

See Also

vft.4p, ft.6p