diff - How to compare 30% up and 30% down of data? -


i have used these script

a=rt[,"expression"]<median(unlist(rt[,"expression"]))  diff=survdiff(surv(futime, fustat) ~a,data = rt)，

to compare 50% , 50% down of data. want compare 30% , 30% down data have no idea how th change script.


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