This function builds decision trees for discrete, right-censored
survival data. The fitted tree estimates the hazard and survival probabilities for every terminal node, as well as the median survival time.
Usage
DStree(formula, status, data, control = control, weights = NULL)
Arguments
formula
a formula with response but no
interaction terms. The response variable represents the
observed survival times.
status
integer/string representing the column
number/name of the 'status' variable in the data frame.
'status' must be a binary integer variable indicating whether the event
occured (=1) or whether the event was censored/did not
occur (=0).
data
data frame that contains all variables stated
in the formula argument, as well as the 'status'
variable.
control
a list of options that control
the specification of the DStree algorithm. See DStree.control.
weights
a vector of optional case weights.
Value
An object of class DStree. For details see
DStree.object.
References
Bou-Hamad I., Larocque D., Ben-Ameur H., Masse L. C., Vitaro
F. and Tremblay R. E. (2009), Discrete-Time Survival Trees.
Canadian Journal of Statistics 37 (1), 17-32.
Examples
##Build tree
fit<- DStree(spell~ui+age+tenure+logwage,status="censor1",data=UnempDur,control=list(cp=0))
plot(fit)
Results
R version 3.3.1 (2016-06-21) -- "Bug in Your Hair"
Copyright (C) 2016 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)
R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.
R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.
Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.
> library(DStree)
Loading required package: rpart
Loading required package: pec
Loading required package: prodlim
Loading required package: Ecdat
Loading required package: Ecfun
Attaching package: 'Ecfun'
The following object is masked from 'package:base':
sign
Attaching package: 'Ecdat'
The following object is masked from 'package:datasets':
Orange
> png(filename="/home/ddbj/snapshot/RGM3/R_CC/result/DStree/DStree.Rd_%03d_medium.png", width=480, height=480)
> ### Name: DStree
> ### Title: Fit a discrete-time survival tree
> ### Aliases: DStree
>
> ### ** Examples
>
> ##Build tree
> fit<- DStree(spell~ui+age+tenure+logwage,status="censor1",data=UnempDur,control=list(cp=0))
> plot(fit)
Warning message:
labs do not fit even at cex 0.15, there may be some overplotting
>
>
>
>
>
> dev.off()
null device
1
>
providing 
.
