Description

A S4 class for K-adaptive partitioning for survival data (kaps).

Objects from the Class

Objects can be created by calls of the form new("kaps"). The most important slot is groupID, which is a vector consisting of the information about classified subgroups.

Slots

call:

evaluated function call

formula:

formula used in the model fitting

data:

data used in the model fitting

groupID:

information about the classified subgroup

index:

index for the optimal subgroup among the candidate K

X:

test statistic with the worst pair of subgroups for the split set

Z:

overall test statistic with K subgroups using the split set

pair:

selected pair of subgroups

split.var:

selected covariate in the model fitting

split.pt:

selected set of cut-off points

mindat:

minimum number of observations at a subgroup

test.stat:

Bonferroni corrected p-value matrix. The first row means overall p-values and the second one denotes p-values of the worst-pair against K. The column in the matrix describes the order of K.

over.stat.sample:

adjusted overall test statistic by Bootstrapping

pair.stat.sample:

adjusted worst-pair test statistic by Bootstrapping

groups:

candidate K used in the argument

results:

a list of results about each K

Options:

tuning parameters

Methods

show

signature(object = "kaps"): Same as the show method without the optional arguments

print

signature(x = "kaps", K): Same as the print method with the specified number of subgroups K.

plot

signature(x = "kaps", K): Plot an object

predict

signature(object = "kaps"): Predict an object by the estimated cut-off points

summary

signature(object = "kaps"): Summarize an object by survival times for each subgroup

Examples