try this:
b <- rnorm(4)
ind <- unlist(lapply(seq_along(b), seq_len))
b
b[ind]
I hope it helps.
Best,
Dimitris
----
Dimitris Rizopoulos
Biostatistical Centre
School of Public Health
Catholic University of Leuven
Address: Kapucijnenvoer 35, Leuven, Belgium
Tel: +32/(0)16/336899
Fax: +32/(0)16/337015
Web: http://med.kuleuven.be/biostat/
http://perswww.kuleuven.be/dimitris_rizopoulos/
----- Original Message -----
From: "Chaofeng Kou" <[EMAIL PROTECTED]>
To: <r-help@r-project.org>
Sent: Friday, July 18, 2008 2:21 PM
Subject: [R] generate repeats of a vector's elements
Dear all,
I have got a question for generating repeats of a vector's elements.
Please don't hesitate to email me back and say that it is very easy
although I can't find a method to solve it.
If I have a n-vector b, whose elements are b[1], b[2], ..., b[n],
how
can I generate such a vector
b[1], b[1], b[2], b[1], b[2], b[3], b[1], b[2], b[3], b[4],
......, b[1], b[2], ..., b[n]
which contains n(n+1)/2 elements.
Thanks very much.
Regards
Chaofeng Kou
[[alternative HTML version deleted]]
______________________________________________
R-help@r-project.org mailing list
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.
Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm
______________________________________________
R-help@r-project.org mailing list
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.
