Description Usage Arguments Value References See Also Examples
ptwiseELtest
gives pointwise EL statistic values at uncensored time span.
The pointwise statistic considers only the decision on each single time point;
thus, it is different from the integral type
and
sup type
statistics.
1 2 3  ptwiseELtest(data, g1 = 1, t1 = 0, t2 = Inf, sided = 2,
nboot = 1000, alpha = 0.05, compo = FALSE, seed = 1011,
nlimit = 200)

data 
a data frame/matrix with 3 columns. The first column is
the survival time. The second is the censoring indicator. The last is
the grouping variable. An example as the input to 
g1 
the group with longer survival in onesided testing with the default value of 1. 
t1 
prespecified t_1 based on domain knowledge with the default value of 0 
t2 
prespecified t_2 based on domain knowledge with the default value of ∞ 
sided 
2 if twosided test, and 1 if onesided test. It assumes the default value of 2. 
nboot 
number of bootstrap replications in calculating critical values with the defualt value of 1000. 
alpha 
prespecified significance level of the test with the default value of 0.05 
compo 
FALSE if taking the standardized square of the difference as the local statisic for twosided testing, and TRUE if constructing for onesided testing, but only the positive part of the difference included. It assumes the default value of FALSE. 
seed 
the parameter with the default value of 1011 to 
nlimit 
the splitting unit with the default value of 200. To deal with large data problems, the bootstrap algorithm is
to split the number of bootstrap replicates into 
ptwiseELtest
returns a list with four elements:
time_pts
the values of statistics at each uncensored time point
decision
logical values. See stat_ptwise
.
stat_ptwise
the decision of the test in which the null hypothesis os rejected at a
specific day if the decision exhibits 1 and not rejected if otherwise
critval_ptwise
the critical values of the statistic at each uncensored time point
H.w. Chang and I. W. McKeague, "Empirical likelihood based tests for stochastic ordering under right censorship," Electronic Journal of Statistics, Vol. 10, No. 2, pp. 25112536 (2016).
hepatitis
, intELtest
, supELtest
1 2 3 4 5 6 7 8  library(EL2Surv)
ptwiseELtest(hepatitis)
## It produces the estimates on 44 distinct uncensored days
## out of 57 possibly repeated uncensored days.
ptwiseELtest(hepatitis, t1 = 30, t2 = 60)
## It produces the estimates on 12 distinct uncensored days
## on the restricted time interval [30, 60].

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