Computes n and m vectors as described by Nieto-Barajas and Walker (2002).
BeNM(times, delta)
Numeric vector. Reflects how observations are distributed by interval.
Numeric vector. Returns a cummulative lifetime of the observations that fall into the corresponding interval.
Numeric vector. Time axis partition.
Partition length.
Numeric vector. Uncensored times sorted ascendengly.
Nieto-Barajas, L. E. & Walker, S. G. (2002). Markov beta and gamma processes for modelling hazard rates. Scandinavian Journal of Statistics 29, 413-424.