Sunwghts: Estimate Survivor Function using Doubly Interval-Censored...

In doubcens: Survivor Function Estimation for Doubly Interval-Censored Failure Time Data

Description

Estimates the discrete Survivor Function from doubly interval-censored left-truncated failure time data using the algorithm of Sun.

Usage

Sunwghts(Ei, Ri, Li, Ui, Bi1, Bi2)

Arguments

Ei	The left endpoint of the censoring interval for the initial event time
Ri	The right endpoint of the censoring interval for the initial event time
Li	The left endpoint of the censoring interval for the terminating event time
Ui	The right endpoint of the censoring interval for the terminating event time
Bi1	The left endpoint of the truncation interval for the terminating event time
Bi2	The right endpoint of the truncation interval for the terminating event time

Details

Set Ei = Ri if the initial event is observed. Set Li = Ui if the terminating event is observed. Set Ei = -INF if the initial event is left-censored. Set Ri = INF if the terminating event is right-censored.

Value

Sunwghts returns a list containing the following components

uj	A vector of mass points for survival lengths
fnew	A vector of estimated probabilities for uj
counter	Number of iterations required for convergence

References

Sun, J. (1995). Empirical Estimation of a Distribution Function with Truncated and Doubly Interval-Censored Data and Its Applications to AIDS Studies. Biometrics 51 (3): 1096-1104.

Examples

test <- Sunwghts(c(1,2,1), c(4,4,4), c(5,8,9), c(5,9,10), 
		c(4.4,4.5,8), c(Inf, Inf, Inf))

doubcens documentation built on May 2, 2019, 9:19 a.m.