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Use
unique(c(1,2,2,3,3,3,3,3,4))
Hugh Jones
Senior Biometrician
Centre for Natural Resources
NSW
Depart. Infrastructure, Planning & Natural Resources
P.O. Box 3720,
Parramatta NSW 2124
Tel: 61-2- 9895 7628
Fax: 61-2- 9895
7867
>>> "Jonathan Dakin" <jd@johndakin.demon.co.uk>
10/06/2004 02:34:25 >>>
Dear S users,
Is there a simple way of reducing a vector to one in
which each element is expressed once, no matter how many occurences there are in
the original ?
Eg :
1,2,2,3,3,3,3,3,4 ---->
1,2,3,4
I have been using such convoluted means as the
intersection with the set of integers, or reducing to factor data and then
re-converting. Clearly there is something I'm missing. Many
thanks.
Jonathan Dakin
Imperial College London
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