| umbrella {RPEXE.RPEXT} | R Documentation |
Umbrella alternative.
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)