[R] Merge selected list element by name

[Bert Gunter]

So do you mean like this:

> kk<- list (a = 1:5, b = 6:10, c = 4:11)
> kk1 <- list(union(kk$a,kk$c),kk$b)
> names(kk1)<- c(paste(names(kk)[c(1,3)],collapse="_"),names(kk)[2])
> kk1
$a_c
 [1]  1  2  3  4  5  6  7  8  9 10 11

$b
[1]  6  7  8  9 10

??

Cheers,
Bert

Bert Gunter

"The trouble with having an open mind is that people keep coming along
and sticking things into it."
-- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )


On Thu, Apr 13, 2017 at 10:33 AM, Mohammad Tanvir Ahamed via R-help
<r-help at r-project.org> wrote:
> Thanks for your code.
> But this is not the way i am expecting .
>
> I want to merge (Union) "a" and "c" and my expected output is
>
>> kk1
> $a_c
>  [1]  1  2  3  4  5  6  7  8  9 10 11
>
> $b
> [1]  6  7  8  9 10
>
>
> Note : I worte the code kk1<- list(a_c = 1:11, b = 6:10) just to show by expected outcome. But i am expecting the resulting code will naming "a_c" by itself also.
> Hope i can make clear about problem.
>
>
>
>
> Tanvir Ahamed
> Göteborg, Sweden  |  mashranga at yahoo.com
>
>
>
> ________________________________
> From: Rui Barradas <ruipbarradas at sapo.pt>
>
> lp at r-project.org>
> Sent: Thursday, 13 April 2017, 18:37
> Subject: Re: [R] Merge selected list element by name
>
>
>
> Hello,
>
> There's no need to send the same question twice, we've got it at the
> first try.
> Maybe I don't understand but is this it?
>
> kk1 <- list(a_c = union(kk$a, kk$c), b = kk$b)
> kk1
> $a_c
>   [1]  1  2  3  4  5  6  7  8  9 10 11
>
> $b
> [1]  6  7  8  9 10
>
>
> Hope this helps,
>
> Rui Barradas
>
>
> Em 13-04-2017 15:59, Mohammad Tanvir Ahamed via R-help escreveu:
>>
>> Hi,
>>
>> I have a list like
>>
>> kk<- list (a = 1:5, b = 6:10, c = 4:11)
>>
>>
>> Now i want to merger (Union) the list element "a" and "c" by name .
>>
>>
>> My expected outcome is
>>
>> kk1<- list(a_c = 1:11, b = 6:10)
>>
>>
>>
>> I can do it with several lines of code. But can any one have idea to do efficiently/ quickly on a big data with less code.
>>
>> Thanks in advance.
>>
>>
>> Tanvir Ahamed
>>
>
>>
>> ______________________________________________
>> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>
>>
>
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.