51 lines
1.6 KiB
Plaintext
51 lines
1.6 KiB
Plaintext
|
|
R Under development (unstable) (2019-04-05 r76323) -- "Unsuffered Consequences"
|
|
Copyright (C) 2019 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(rpart)
|
|
> require(survival)
|
|
Loading required package: survival
|
|
> aeq <- function(x,y, ...) all.equal(as.vector(x), as.vector(y), ...)
|
|
>
|
|
> set.seed(10)
|
|
> #
|
|
> # Check out using costs
|
|
> #
|
|
> fit1 <- rpart(Surv(time, status) ~ age + sex + ph.ecog + ph.karno + pat.karno
|
|
+ + meal.cal + wt.loss, data=lung,
|
|
+ maxdepth=1, maxcompete=6, xval=0)
|
|
>
|
|
> fit2 <- rpart(Surv(time, status) ~ age + sex + ph.ecog + ph.karno + pat.karno
|
|
+ + meal.cal + wt.loss, data=lung,
|
|
+ maxdepth=1, maxcompete=6, xval=0, cost=(1+ 1:7/10))
|
|
>
|
|
> temp1 <- fit1$splits[1:7,]
|
|
> temp2 <- fit2$splits[1:7,]
|
|
> temp3 <- c('age', 'sex', 'ph.ecog', 'ph.karno', 'pat.karno', 'meal.cal',
|
|
+ 'wt.loss')
|
|
> indx1 <- match(temp3, dimnames(temp1)[[1]])
|
|
> indx2 <- match(temp3, dimnames(temp2)[[1]])
|
|
> aeq(temp1[indx1,1], temp2[indx2,1]) #same n's ?
|
|
[1] TRUE
|
|
> aeq(temp1[indx1,3], temp2[indx2,3]*(1+ 1:7/10)) #scaled importance
|
|
[1] TRUE
|
|
>
|
|
>
|
|
>
|
|
> proc.time()
|
|
user system elapsed
|
|
0.693 0.051 0.738
|