[R] Kaplan-Meier plot

[Bert Gunter]

Have you consulted ?plot.survfit ? There are examples for KM plots there.

Also, obvious question: Have you specfied the censoring properly in your
data and fit?


Bert Gunter

"The trouble with having an open mind is that people keep coming along and
sticking things into it."
-- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )


On Thu, Jan 17, 2019 at 11:39 AM Medic <mailiPadpost using gmail.com> wrote:

> According to the guidelines (if I'm not mistaken), the code below is
> sufficient (without any specification) to give Kaplan-Meier curves with
> censored data markings on Kaplan-Meier curves. But in my case censored data
> don't appears on the curves?!
>
> library(survival)
> mydata<-read.csv (file="C:/mydata/mydata.csv", header=TRUE, sep=";" )
> # Sic! The separator in my csv file is ";"
>
> dput (mydata, "dputmydata.r")
> #attached
>
> Y <- Surv (mydata$time, mydata$status == 2)
> # 2 -- encodes event
>
> km <- survfit (Y~mydata$stage)
>
> plot (km)
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