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In trying to get NULL members into a list, I found out about alist(). x<-alist() x$one<-1 x$two<-NULL but x$two doesn't exist. It seems, though, that an alist is just a list. How can one put NULL members into a list?

Full_Name: Glen Herrmannsfeldt Version: 2.2.1 OS: Linux Submission from: (NULL) (128.95.113.77) Following the discussion in "Writing R Extensions" in section 5.8.2, there is no indication that showArgs expects a pairlist() instead of a list(). I was trying .Call("showArgs",list(one=1,two=2,three=3)) for...