tau {parfm}

Kendall's Tau for Parametric Frailty Models

Description

Computes Kendall's Tau for Parametric Frailty Models

Usage

tau(x)

Arguments

x

A parametric frailty model, object of class parfm.

Author(s)

Federico Rotolo [aut, cre], Marco Munda [aut], Andrea Callegaro [ctb]

References

Kendall, MG. (1938) A new measure of rank correlation. Biometrika 30(1/2), 81-93. DOI: <doi: 10.2307/2332226>

See Also

parfm

Examples

data(kidney) 
# type 'help(kidney)' for a description of the data set
kidney$sex <- kidney$sex - 1

mod <- parfm(Surv(time,status) ~ sex + age, cluster = "id",
             data = kidney, dist = "exponential", frailty = "gamma")
tau(mod)