step2jump: Increments from a step function of time
In coxinterval: Cox-Type Models for Interval-Censored Data

Description Usage Arguments Value See Also Examples

A utility function for coxdual that returns increments from values of a step function over time.

1	step2jump(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 matrix of the same dimension as step.

jump2step

fit <- coxdual(Surv(start, stop, status) ~ cluster(id)
               + trans(from, to) + z, data = dualrc, init.coxph = TRUE)
haz <- step2jump(fit$coxph$basehaz, stratum = 3)
Haz <- jump2step(haz, stratum = 3)
all(Haz == fit$coxph$basehaz)