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how to create duplicated ID in multi-records per subject dataset
Zhixin Liu
·
Dec 14, 2008
·
r-help
Hi R helpers, If I have a dataset looks like: ID record 1 20 . 30 . 25 2 26 . 15 3 21 4..................... And I want it becomes ID record 1 20 1 30 1 25 2 26 2 15 3...
using newdata in survfit with categorical variable
Zhixin Liu
·
Nov 10, 2008
·
r-help
Hi R-helpers, I was trying to put gender='Male' in newdata to create a expected survival curve for a pseudo cohort by using survfit based on Cox regression. My codes are shown below: fit<- coxph(Surv(end, status2)~gender...
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