Displaying 1 result from an estimated 1 matches for "_na_list_".
2009 Mar 15
2
Definition of [[
The semantics of [ and [[ don't seem to be fully specified in the
Reference manual. In particular, I can't find where the following
cases are covered:
> cc <- c(1); ll <- list(1)
> cc[3]
[1] NA
OK, RefMan says: If i is positive and exceeds length(x) then the
corresponding selection is NA.
> dput(ll[3])
list(NULL)
? i is positive and exceeds length(x); why isn't this