R help - Feb 2009 - sequence that counts up and back down

I hit a minor sticking point working one of the problems in 'Using R' 
(Verzani).  I'm having difficulty with generating a sequence that goes 
1, 2, 3, 4, 5, 4, 3, 2, 1.  I can make one that counts up, I can make 
one that counts down, etc. but one that counts up then down like this 
(short of just using c() ) is stumping me.

Any help (on or off list) would be appreciated.

Thanks,

Monte

one way is the following:

5 - abs(-4:4)


I hope it helps.

Best,
Dimitris

Monte Milanuk wrote:
> I hit a minor sticking point working one of the problems in 'Using
R'
> (Verzani).  I'm having difficulty with generating a sequence that goes 
> 1, 2, 3, 4, 5, 4, 3, 2, 1.  I can make one that counts up, I can make 
> one that counts down, etc. but one that counts up then down like this 
> (short of just using c() ) is stumping me.
> 
> Any help (on or off list) would be appreciated.
> 
> Thanks,
> 
> Monte
> 
> ______________________________________________
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> PLEASE do read the posting guide 
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
> 
-- 
Dimitris Rizopoulos
Assistant Professor
Department of Biostatistics
Erasmus Medical Center

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