Computing the survival curve from a Cox model
In this exercise, we will reproduce the example from the video following the steps:
- Compute Cox model
- Decide on "imaginary patients"
- Compute survival curves
- Create
data.framewith survival curve information - Plot
We will focus now on the first three steps in this exercise and do the next two steps in the upcoming exercise.
The survival and survminer packages and the GBSG2 data are loaded for you in this exercise.
Den här övningen är en del av kursen
Survival Analysis in R
Interaktiv övning med praktiskt arbete
Testa den här övningen genom att slutföra den här exempelkoden.
# Cox model
cxmod <- ___(Surv(time, cens) ~ horTh + tsize, data = GBSG2)
# Imaginary patients
newdat <- expand.grid(
horTh = levels(GBSG2$___),
tsize = quantile(GBSG2$___, probs = c(0.25, 0.5, 0.75)))
___(newdat) <- letters[1:6]
# Inspect newdat
newdat