jump2step: Accumulate increments in values from a step function of time
In aboruvka/coxinterval: Cox-Type Models for Interval-Censored Data

Description Usage Arguments Value See Also Examples

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

1	jump2step(jump, time = "time", strata = "strata")

`jump`	a matrix whose columns give increments in the (possibly multivariate) step function, corresponding time points and strata.
`time`	an integer or character value indicating the column index or name of the time variable in the matrix `jump`. Defaults to `"time"`.
`strata`	integer or character value for the column index or name of the stratifying variable in the matrix `jump`. Defaults to `"strata"`. If any character provided is not a column name, `jump` is presumed unstratified.

A matrix of the same dimension as jump.

step2jump

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