[R] generate a list as follows: 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, . . . . ., n, n, n, n

[Jeff Newmiller]

You are not generating lists, you are generating vectors.

Try

rep( seq.int( n ), each= 4 )
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Sent from my phone. Please excuse my brevity.

On April 19, 2015 6:44:56 AM PDT, John Sorkin <JSorkin at 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) 
>
>
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>
>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) 
>
>
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