hGgompertz: The hazard function of a Gompertz-gamma distribution

In goranbrostrom/eha2: Event History Analysis

Description

The hazard function h(x) is defined as

h(x) = shape * exp(x / scale) / (1 + frail * scale * shape * (exp(x / scale) - 1))

When frail = 0, this simplifies to

h(x) = shape * exp(x / scale)

which is the hazard function of the standard Gompertz distribution

Usage

hGgompertz(x, shape = 1, scale = 1, frail = 0, log.p = FALSE)

Arguments

x	A vector of positive numbers
shape	The shape parameter
scale	The scale parameter
frail	The frailty parameter
log.p	Logical, should the result be on a log scale?

Value

A numerical vector of the same length as x.

Examples

hGgompertz(c(1, 3, 5))

goranbrostrom/eha2 documentation built on May 17, 2019, 7:59 a.m.