umbrella: Umbrella alternative.

In RPEXE.RPEXT: Reduced Piecewise Exponential Estimate/Test Software

Description

Using the umbrella alternative to merge certain entries to make the sequence of ttot/deaths to increase then decrease or to decrease then increase. Note that the pava function imposes non-decreasing or non-increasing order. This function directly uses function pava().

Usage

umbrella(time_die,ttot,deaths,indi)

Arguments

time_die	a sequence of times where deaths happened.
ttot	the total time on test between each time point and the previous time point (or 0).
deaths	the number of deaths at each time point.
indi	an indicator indi == 0: monotonic failure rate (either decrease or increase) indi == 1: denoting the failure rate increase then decrease indi == 2: denoting the failure rate decrease then increase

Value

time2 == the merged time_die after the umbrealla alternative order restriction; struct == a structure saves the partition information; label == a note about how the failure rate varies; indx == the position where the change point value is.

Examples

data(pava_dfrd)
t_d = pava_dfrd[,1]
t = pava_dfrd[,2]
d = pava_dfrd[,3]
umbrella(t_d, t, d, 2)

RPEXE.RPEXT documentation built on July 1, 2020, 6:02 p.m.