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library(survminer)
library(survival)
lung
a=Surv(lung$time,lung$status)
b=survfit(a~lung$sex)
ggsurvplot(b,lung,pval=T,conf.int=T,risk.table=T,risk.table.col="sex",ncensor.plot=T,legend.title="SEX",legend.labs=c("Male","Female"),title="R2-21")
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