In '?rep' find out about the 'each' argument.
Also there is the function 'gl' which creates a factor and offers a shorter
syntax for your problem.
If n equals 5 use one of:
rep(seq(5), each = 4)
gl(5,4)
On 19 April 2015 at 15:44, John Sorkin <jsor...@grecc.umaryland.edu> wrote:
> Windows 7 64-bit
> R 3.1.3
> RStudio 0.98.1103
>
>
> I am trying to generate a list of length 4n which consists of the
> integers 1 to n repeated in groups of four, i.e.
>
> 1,1,1,1, 2,2,2,2, 3,3,3,3, . . . . , n,n,n,n
>
> (The spaces in the list are added only for clarity.)
>
> I can generate the list as follows, but the code must be modified for any
> value n, and the code is UGLY!
>
> c(rep(1,4), rep(2,4), rep(3,4), . . . ,c(n,4))
>
> Can anyone help me?
>
> Thank you,
> John
>
> John David Sorkin M.D., Ph.D.
> Professor of Medicine
> Chief, Biostatistics and Informatics
> University of Maryland School of Medicine Division of Gerontology and
> Geriatric Medicine
> Baltimore VA Medical Center
> 10 North Greene Street
> GRECC (BT/18/GR)
> Baltimore, MD 21201-1524
> (Phone) 410-605-7119410-605-7119
> (Fax) 410-605-7913 (Please call phone number above prior to faxing)
>
>
> Call
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> You'll need Skype CreditFree via Skype
>
> John David Sorkin M.D., Ph.D.
> Professor of Medicine
> Chief, Biostatistics and Informatics
> University of Maryland School of Medicine Division of Gerontology and
> Geriatric Medicine
> Baltimore VA Medical Center
> 10 North Greene Street
> GRECC (BT/18/GR)
> Baltimore, MD 21201-1524
> (Phone) 410-605-7119410-605-7119
> (Fax) 410-605-7913 (Please call phone number above prior to faxing)
>
>
>
>
> John David Sorkin M.D., Ph.D.
> Professor of Medicine
> Chief, Biostatistics and Informatics
> University of Maryland School of Medicine Division of Gerontology and
> Geriatric Medicine
> Baltimore VA Medical Center
> 10 North Greene Street
> GRECC (BT/18/GR)
> Baltimore, MD 21201-1524
> (Phone) 410-605-7119
> (Fax) 410-605-7913 (Please call phone number above prior to faxing)
>
>
> Confidentiality Statement:
> This email message, including any attachments, is for ...{{dropped:16}}
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