On May 30, 2010, at 9:44 AM, Kang Min wrote:
Hmm x[8:14] didn't work. Yes Iverson's method worked, I wanted the
whole list, with 7 elements in each vector.
Now I want the whole list as well, but with the 8th to 14th element.
Oh, ... then in what sense did the lapply method not work? What code
did you use? Did you get an error message? (It seems to be working
fine for that purpose on my machine.)
--
David.
On May 30, 7:47 pm, David Winsemius <dwinsem...@comcast.net> wrote:
On May 29, 2010, at 11:37 PM, Kang Min wrote:
What if I want to select the 8th to 14th element of the list? I
tried
to use "[" again, but it doesn't work.
x[8:14]
(And I could not get Iverson's earlier method to work properly on a
long list. It just returned the whole list. Did it work properly for
you? )
--
David.
"[" is a function, and you want to use it on each element of the
list,
so...
lapply(x, "[", c(1:7))
and the call to c() is of course not necessary, since ":" will
generate a vector.
David Winsemius, MD
West Hartford, CT
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