[R] Selecting first 7 elements

[David Winsemius]

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.
>>
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>
> ______________________________________________
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> 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.

David Winsemius, MD
West Hartford, CT