A method to compute the survival function for the interval censored survival data based on a spline function based constrained maximum likelihood estimator. The maximization process of likelihood is carried out by generalized gradient projection method.
condS(L, R, M, Delta, t, m)The numericvector of left limit of observed time. For left censored observations L == 0.
The numericvector of right limit of observed time. For right censored observation R == inf.
An array contains marker levels for the samples.
An array of indicator for the censored type, use 1, 2, 3 for event happened before the left bound time, within the defined time range, and after.
A scalar indicates the predict time.
A scalar for the cutoff of the marker variable.
Wu, Yuan; Zhang, Ying. Partially monotone tensor spline estimation of the joint distribution function with bivariate current status data. Ann. Statist. 40, 2012, 1609-1636 <doi:10.1214/12-AOS1016>