Survival Task Generator for Package 'coxed'

A TaskGenerator calling coxed::sim.survdata().

This generator creates a survival dataset using coxed, and exposes some parameters from the coxed::sim.survdata() function. We don't include the parameters X (user-specified variables), covariate, low, high, compare, beta and hazard.fun for this generator. The latter means that no user-specified hazard function can be used and the generated datasets always use the flexible-hazard method from the package.

Dictionary

This TaskGenerator can be instantiated via the dictionary mlr_task_generators or with the associated sugar function tgen():

mlr_task_generators$get("coxed")
tgen("coxed")

Parameters

Id	Type	Default	Levels	Range
T	numeric	100		\([1, \infty)\)
type	character	none	none, tvbeta	-
knots	integer	8		\([1, \infty)\)
spline	logical	TRUE	TRUE, FALSE	-
xvars	integer	3		\([1, \infty)\)
mu	untyped	0		-
sd	untyped	0.5		-
censor	numeric	0.1		\([0, 1]\)
censor.cond	logical	FALSE	TRUE, FALSE	-

References

Harden, J. J, Kropko, Jonathan (2019). “Simulating Duration Data for the Cox Model.” Political Science Research and Methods, 7(4), 921–928. doi:10.1017/PSRM.2018.19 .

See also

• Dictionary of TaskGenerators: mlr3::mlr_task_generators

• as.data.table(mlr_task_generators) for a table of available TaskGenerators in the running session

Other TaskGenerator: mlr_task_generators_simdens, mlr_task_generators_simsurv

Super class

mlr3::TaskGenerator -> TaskGeneratorCoxed

Methods

Public methods

• TaskGeneratorCoxed$new()

• TaskGeneratorCoxed$help()

• TaskGeneratorCoxed$clone()

Inherited methods

• mlr3::TaskGenerator$format()
• mlr3::TaskGenerator$generate()
• mlr3::TaskGenerator$print()

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Method new()

Creates a new instance of this R6 class.

Usage

TaskGeneratorCoxed$new()

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Method help()

Opens the corresponding help page referenced by field $man.

Usage

TaskGeneratorCoxed$help()

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Method clone()

The objects of this class are cloneable with this method.

Usage

TaskGeneratorCoxed$clone(deep = FALSE)

Arguments

deep

Whether to make a deep clone.

Examples

  library(mlr3)

  # time horizon = 365 days, censoring proportion = 60%, 6 covariates normally
  # distributed with mean = 1 and sd = 2, independent censoring, no time-varying
  # effects
  gen = tgen("coxed", T = 365, type = "none", censor = 0.6, xvars = 6,
              mu = 1, sd = 2, censor.cond = FALSE)
  gen$generate(50)
#> 
#> ── <TaskSurv> (50x8) ───────────────────────────────────────────────────────────
#> • Target: y and failed
#> • Properties: -
#> • Features (6):
#>   • dbl (6): X1, X2, X3, X4, X5, X6

  # same as above, but with time-varying coefficients
  gen$param_set$set_values(type = "tvbeta")
  gen$generate(50)
#> 
#> ── <TaskSurv> (50x8) ───────────────────────────────────────────────────────────
#> • Target: y and failed
#> • Properties: -
#> • Features (6):
#>   • dbl (6): X1, X2, X3, X4, X5, X6