invert: Invert the censoring status of a Surv object
In aroneklund/surviplot: Draw Survival Curves with Number-at-Risk

Description Usage Arguments Details Value Examples

Invert the censoring status of a Surv object

invert(x)

`x`	A `Surv` object.

For each item, the "status" is reversed, so alive becomes dead, and dead becomes alive.

This may be useful to check for bias in censoring.

A Surv object.

  

  surv <- Surv(colon$time / 365, colon$status)

  ## normal survival plot
  surviplot(surv ~ sex, data = colon,
    xlab = 'Time (years)', ylab = 'Fraction surviving')

  ## Censoring rate plot
  surviplot(invert(surv) ~ sex, data = colon,
    xlab = 'Time (years)', ylab = 'Fraction not censored')