survobj (version 3.1.1)

nhpp: Generate random recurrent episodes under a non homogeneous Poisson process

Description

Generate a random draws from the distribution of recurrent set of survival times under a a non homogeneous Poisson process following Leemis (1987)

Usage

nhpphr(SURVIVAL, hr, prevtime)
nhppaft(SURVIVAL, aft, prevtime)

Value

Vector of survival times

Arguments

SURVIVAL

Object of survival class

hr

Vector of hazard ratios

prevtime

Vector of previous survival times

aft

Vector of accelerated failure ratios

Functions

• nhpphr(): Recurrent episodes under a proportional hazard model

• nhppaft(): Recurrent episodes under an accelerated failure time model

Examples

s_obj <- s_exponential(fail = 0.4, t = 1)
hr <- c(1,1,0.5,0.5)
time1 <- rsurvhr(s_obj, hr)
time2 <- nhpphr(s_obj,hr, time1)

s_obj <- s_exponential(fail = 0.4, t = 1)
aft <- c(1,1,0.5,0.5)
timea <- rsurvaft(s_obj, aft)
timeb <- nhppaft(s_obj, aft, timea)