[R] Kaplan-Meier plot

[Marc Schwartz]

Hi,

Just to emphasize Bert's e-mail with a hint, the 'mark.time' argument for plot.survfit() is FALSE by default.

Regards,

Marc Schwartz


> On Jan 17, 2019, at 2:45 PM, Bert Gunter <bgunter.4567 using gmail.com> wrote:
> 
> 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)