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 one-sided testing with the default value of 1. |
t1 |
pre-specified t_1 based on domain knowledge with the default value of 0 |
t2 |
pre-specified t_2 based on domain knowledge with the default value of ∞ |
sided |
2 if two-sided test, and 1 if one-sided test. It assumes the default value of 2. |
nboot |
number of bootstrap replications in calculating critical values with the defualt value of 1000. |
alpha |
pre-specified 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 two-sided testing, and TRUE if constructing for one-sided 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. 2511-2536 (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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