Define a Restricted Cubic Spline Survival Distribution

Define a restricted cubic spline parametric survival distribution.

Usage

define_surv_spline(scale = c("hazard", "odds", "normal"), ...)

Arguments

scale

"hazard", "odds", or "normal", as described in flexsurvspline. With the default of no knots in addition to the boundaries, these models reduce to the Weibull, log-logistic and log-normal respectively. The scale must be common to all times.

...

Additional distribution parameters (see respective distribution help pages).

Value

A surv_dist object.

Examples

define_surv_spline(
  scale = "hazard", 
  gamma = c(-18.3122, 2.7511, 0.2292), 
  knots=c(4.276666, 6.470800, 7.806289)
)
#> $distribution
#> [1] "survspline"
#> 
#> $scale
#> [1] "hazard"
#> 
#> $gamma
#> [1] -18.3122   2.7511   0.2292
#> 
#> $knots
#> [1] 4.276666 6.470800 7.806289
#> 
#> attr(,"class")
#> [1] "surv_dist"   "surv_object"
define_surv_spline(
  scale = "odds", 
  gamma = c(-18.5809, 2.7973, 0.2035), 
  knots=c(4.276666, 6.470800, 7.806289)
)
#> $distribution
#> [1] "survspline"
#> 
#> $scale
#> [1] "odds"
#> 
#> $gamma
#> [1] -18.5809   2.7973   0.2035
#> 
#> $knots
#> [1] 4.276666 6.470800 7.806289
#> 
#> attr(,"class")
#> [1] "surv_dist"   "surv_object"