> On Sep 9, 2017, at 11:45 AM, Andre Mikulec <andre_miku...@hotmail.com> wrote:
>
> list subselect by name ?
> -------------------------
>
> I have this 'list of two elements of named elements.'
>
>> list(letters=letters, LETTERS=LETTERS)[c("letters","LETTERS")]
>
> $letters
> [1] "a" "b" "c" "d" "e" "f" "g" "h" "i" "j" "k" "l" "m" "n" "o" "p" "q" "r"
> "s"
> [20] "t" "u" "v" "w" "x" "y" "z"
>
> $LETTERS
> [1] "A" "B" "C" "D" "E" "F" "G" "H" "I" "J" "K" "L" "M" "N" "O" "P" "Q" "R"
> "S"
> [20] "T" "U" "V" "W" "X" "Y" "Z"
>
>> str( list(letters=letters, LETTERS=LETTERS)[c("letters","LETTERS")] )
> List of 2
> $ letters: chr [1:26] "a" "b" "c" "d" ...
> $ LETTERS: chr [1:26] "A" "B" "C" "D" ...
>
> What code do I need to write in place of ??????????????????
> to return a 'list of one element that is named.'
>
>> list(letters=letters, LETTERS=LETTERS)????????????????????
>
> $LETTERS
> [1] "A" "B" "C" "D" "E" "F" "G" "H" "I" "J" "K" "L" "M" "N" "O" "P" "Q" "R"
> "S"
> [20] "T" "U" "V" "W" "X" "Y" "Z"
>
>> str( list(letters=letters, LETTERS=LETTERS)???????????????????? )
>
> List of 1
> $ LETTERS: chr [1:26] "A" "B" "C" "D" ...
Wouldn't this just be one of these:
#1
list(letters=letters, LETTERS=LETTERS)["LETTERS"]
#2
list(letters=letters, LETTERS=LETTERS)[2]
#3
mylist <- list(letters=letters, LETTERS=LETTERS)
mylist[ which(names(mylist) == "LETTERS") ]
--
David.
>
> Thanks,
>
> Andre Mikulec
> andre_miku...@hotmail.com
>
>
> [[alternative HTML version deleted]]
>
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David Winsemius
Alameda, CA, USA
'Any technology distinguishable from magic is insufficiently advanced.'
-Gehm's Corollary to Clarke's Third Law
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