"a" looks pretty short to me, just two elements.
You should spend some (more) time reading the "Introduction to R" document that
is supplied with the software... particularly the parts on indexing.
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Sent from my phone. Please excuse my brevity.
"李红旺" <hongwan...@sjtu.edu.cn> wrote:
>> a<-c(1,4)
>> a
>[1] 1 4
>> b<-a*5
>> b
>[1] 5 20
>
>a is a very long vector , how can i get c(1:5,4:20)? i do not want to
>use a loop.
>
>thanks very much!
>
>______________________________________________
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>PLEASE do read the posting guide
>http://www.R-project.org/posting-guide.html
>and provide commented, minimal, self-contained, reproducible code.
______________________________________________
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
