L2S: Convert the Current Status Data from Long Format to Short...

In emplikCS: Empirical Likelihood with Current Status Data for Mean, Probability, Hazard

Convert the Current Status Data from Long Format to Short Format

Description

Given current status data (two vectors of length n): one vector of inspection times, the other vector = I[Yi <= ti]. We assume the input is ordered according to itime. Convert the same data into short format. Useful when there are a lot of tied inspection times. (saves space).

Usage

L2S(itime, delta) 

Arguments

itime	The inspection times. Length n.
delta	Either 0 or 1. I[yi <= itimei]. Length n.

Details

Same data set of 850 cases Hepatitis A tests from Bulgaria recorded in long format hepABulg in the R package csci compare to the short format hepatitisA in the R package curstatCI.

This function (and the sister function S2L) can be used to convert between the short and long format.

Value

It returns a list containing

Sitime	The ordered inspection times. Short format. Tied itimes removed.
fi	Number of delta's=1, with identical itime ti.
ni	Number of itimes tied at ti.

Author(s)

Mai Zhou <[e-mail]>.

References

Zhou, M. (2026). Empirical Likelihood Method in Survival Analysis 2nd Edition Chapman & Hall/CRC

Examples

 
y <- c(10, 209, 273, 279, 324, 391, 566, 785)
x <- c(21, 38, 39, 51, 77, 185, 240, 289, 524)

emplikCS documentation built on June 21, 2026, 1:07 a.m.