step2stepfun: Step function from cumulative increments over time
In coxinterval: Cox-Type Models for Interval-Censored Data

Description Usage Arguments Value See Also Examples

A utility function for that returns a step function given cumulative increments over time.

1	step2stepfun(step, time = "time", stratum = NULL)

`step`	a matrix whose columns give the (possibly multivariate) step function values, corresponding time points and strata.
`time`	an integer or character value indicating the column index or name of the time variable in the matrix `step`. Defaults to `"time"`.
`stratum`	integer or character value for the column index or name of the stratifying variable in the matrix `step`. If `stratum` is `NULL` (default), `step` is presumed unstratified.

A function that returns cumulative increments for given times. If stratified, a list of such functions given in the same order as the strata.

jump2step step2jump

fit <- coxdual(Surv(start, stop, status) ~ cluster(id)
               + trans(from, to) + z, data = dualrc, init.coxph = TRUE)
head(fit$coxph$basehaz)
Hazfun <- step2stepfun(fit$coxph$basehaz, stratum = 3)
Haz01 <- with(fit$coxph, split(basehaz[, 1:2], basehaz[, 3]))[[1]]
all(Hazfun[[1]](Haz01$time) == Haz01$hazard)