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

[John Sorkin]

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
Send SMS
Add to Skype
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) 




Confidentiality Statement:
This email message, including any attachments, is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply email and destroy all copies of the original message.