37 lines
1.3 KiB
Plaintext
37 lines
1.3 KiB
Plaintext
|
|
||
|
|
R Under development (unstable) (2020-06-10 r78681) -- "Unsuffered Consequences"
|
||
|
|
Copyright (C) 2020 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.
|
||
|
|
|
||
|
|
> # Verify the values found in the Royston paper
|
||
|
|
> library(survival)
|
||
|
|
>
|
||
|
|
> pbc2 <- na.omit(pbc[,-1]) # no id variable, no missings
|
||
|
|
>
|
||
|
|
> pfit1 <- coxph(Surv(time, status==2) ~ . + log(bili) - bili, pbc2,
|
||
|
|
+ ties="breslow")
|
||
|
|
> # backwards elimination was used to eliminate all but 8
|
||
|
|
> pfit2 <- coxph(Surv(time, status==2) ~ age + log(bili) + edema + albumin +
|
||
|
|
+ stage + copper, data=pbc2, ties="breslow")
|
||
|
|
>
|
||
|
|
> temp <- rbind(royston(pfit1), royston(pfit1, adjust=TRUE),
|
||
|
|
+ royston(pfit2), royston(pfit2, adjust=TRUE))
|
||
|
|
> all.equal(round(temp[,1], 2), c(2.86, 2.56, 2.69, 2.59))
|
||
|
|
[1] TRUE
|
||
|
|
>
|
||
|
|
> proc.time()
|
||
|
|
user system elapsed
|
||
|
|
0.824 0.052 0.868
|