search for: subwrap3

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2007 Nov 09
2
wrapper for coxph with a subset argument
...estdf, "sex == 'F'") # Neither of the above use the coxph subset argument # If I try using that, I get stuck with expressions, # I've tried many # different things in the subset argument, but none # seem to do the trick. Is using this argument in a # program even advisable? subwrap3 <- function(x, sb) { coxph(Surv(times,event)~trt, data = x, subset = eval(substitute(sb), x)) } subwrap3(testdf, sex == 'F') #does not work # Using a string, this works, however. subwrap4 <- function(x, sb) { coxph(Surv(times,event)~trt, data = x, subset = eval(parse(text=...