A data frame with 100 observations on the following 3 variables.
L
the left endpoints of the censoring interval
R
the right endpoints of the censoring interval
Z
a continuous covariate
Details
The value R = NA means that the observation is right censored (occurs 2 times).
If L = NA, then the observation is left censored (occurs 26 times).
An observation with R = L means that the time of occurence of the event
is known exactly (occurs 3 times).
References
Dehghan, M. H. and Duchesne, T. (2011). A generalization of Turnbull's estimator for
nonparametric estimation of the conditional survival function with interval-censored data.
Lifetime Data Analysis, 17, 234-255.