Re: [R] generate repeats of a vector's elements

From: Dimitris Rizopoulos <dimitris.rizopoulos_at_med.kuleuven.be>
Date: Fri, 18 Jul 2008 14:41:06 +0200

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/


> 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]]
>
> ______________________________________________
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>

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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. Received on Fri 18 Jul 2008 - 12:42:03 GMT

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