Calculate residuals for flexible survival models

Calculates residuals for flexsurvreg or flexsurvspline model fits.

# S3 method for flexsurvreg
residuals(object, type = "response", ...)

Arguments

object	Output from flexsurvreg or flexsurvspline, representing a fitted survival model object.
type	Character string for the type of residual desired. Currently only "response" is supported. More residual types may become available in future versions.
...	Not currently used.

Value

Numeric vector with the same length as nobs(object).

Details

Residuals of type = "response" are calculated as the naive difference between the observed survival and the covariate-specific predicted mean survival from predict.flexsurvreg, ignoring whether the event time is observed or censored.

See also

predict.flexsurvreg

Examples

fitg <- flexsurvreg(formula = Surv(futime, fustat) ~ age, data = ovarian, dist = "gengamma")
residuals(fitg)
#>  [1]  -187.21560   -88.78121  -255.36822  -873.56963 -1255.83883  -541.96330
#>  [7]  -483.01162  -258.61757   -25.66308  -541.58483  -324.11343  -977.14761
#> [13]    20.81491  -167.52130 -3640.36131 -2316.90107 -3552.79251 -1681.40682
#> [19]  -105.56084 -1679.31116   476.11922    64.41307 -2839.10079  -193.52725
#> [25]  -126.81187  -462.83150