3.3 整理生存分析的输入数据 #1.1由随访时间和死亡时间计算生存时间(月)table(meta$event)## Alive Dead# 20 16meta$time=ifelse(meta$event=="Alive",meta$last_followup,meta$death)meta$time=as.numeric(meta$time)/30#1.2 根据生死定义event,活着是0,死的是1meta$event=ifelse(meta$event=='Alive',0...