Factory of SURVIVAL objects with Log Normal distributions

Creates a SURVIVAL object with a Log Normal distribution.

Usage

s_lognormal(...)

Arguments

...

Parameters to define the distribution. See the Parameters for details

Value

a SURVIVAL object of the log-normal distribution family. See the documentation of s_factory for the methods available for SURVIVAL objects

Parameters

To create a Log Normal 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 = "lognormal") models.

The scale parameter is the median value of the distribution, and the shape is the log standard deviation

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

Examples

s_lognormal(scale = 2,shape = 2)
#> SURVIVAL object
#> Distribution:  LOGNORMAL 
#> scale : 2 
#> shape : 2 
s_lognormal(surv = 0.6, t= 12, shape = 0.5)
#> SURVIVAL object
#> Distribution:  LOGNORMAL 
#> scale : 13.62056 
#> shape : 0.5 
s_lognormal(fail = 0.4, t = 12, shape =0.5)
#> SURVIVAL object
#> Distribution:  LOGNORMAL 
#> scale : 13.62056 
#> shape : 0.5 
s_lognormal(intercept = 0.4, scale = 0.5)
#> SURVIVAL object
#> Distribution:  LOGNORMAL 
#> scale : 1.491825 
#> shape : 0.5