Bert,
we can save a lot of time by using paste and then only one call to eval and
parse.
> x2 <- c("1", "2:5", "3:6", "4", "8", "5:7", "10")
> system.time(for (i in 1:100) unlist(lapply(parse(text=x2),eval)))
user system elapsed
0.06 0.00 0.03
> system.time(for (i in 1:100) eval(parse(text=paste("c(",paste(x2,
collapse=","),")"))))
user system elapsed
0.01 0.00 0.03
>
Rich
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