Factory of SURVIVAL objects with Weibull distributions

Creates a SURVIVAL object with a Weibull distribution.

Usage

s_weibull(...)

Arguments

...

Parameters to define the distribution. See the Parameters for details

Value

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

Parameters

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

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

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

fail, t and shape for the proportion failing (events) at time t and the shape parameter or

intercept and scale for the parameters returned by survreg(.., dist = "weibull") models.

scale = -log(surv)/(t^shape)

scale = -log(1-fail)/(t^shape)

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

Examples

s_weibull(scale = 2,shape = 2)
#> SURVIVAL object
#> Distribution:  WEIBULL 
#> scale : 2 
#> shape : 2 
s_weibull(surv = 0.6, t= 12, shape = 0.5)
#> SURVIVAL object
#> Distribution:  WEIBULL 
#> scale : 0.1474627 
#> shape : 0.5 
s_weibull(fail = 0.4, t = 12, shape =0.5)
#> SURVIVAL object
#> Distribution:  WEIBULL 
#> scale : 0.1474627 
#> shape : 0.5 
s_weibull(intercept = 0.4, scale = 0.5)
#> SURVIVAL object
#> Distribution:  WEIBULL 
#> scale : 0.449329 
#> shape : 2