survobj (version 3.1.1)

s_gompertz: Factory of SURVIVAL objects with Gompertz distributions

Description

Creates a SURVIVAL object with an Gompertz distribution.

Usage

s_gompertz(...)

Value

a SURVIVAL object of the Gompertz distribution family. See the documentation of s_factory for the methods available for SURVIVAL objects

Arguments

...

Parameters to define the distribution. See the Parameters for details

Parameters

To create an exponential survival object the following options are available:

scale and shape to specify the canonical parameter of the distribution, or

surv, t and shape for the proportion surviving (no events) at time t and shape, or

fail and t and shape for the proportion failing (events) at time t and shape.

scale = -log(surv)·shape/(exp(shape·t))

scale = -log(1-fail)·shape/(exp(shape·t))

The parameters should be spell correctly as partial matching is not available

Examples

s_gompertz(scale = 1, shape = 1.5)
s_gompertz(surv = 0.4, t = 2, shape = 1.5)
s_gompertz(fail = 0.6, t = 2, shape = 1.5)