[R] table lookup n R

Don MacQueen macq at llnl.gov
Wed Jul 14 16:35:02 CEST 2004

There is also the match() function, and the %in% operator, either of 
which might do the job, depending on your exact details. For example,

    (1:26)[letters %in% c('x','t','j')]


At 2:34 PM +0200 7/13/04, Anne wrote:
>Hello R helpers!
>I looked  but did not find a table-lookup R-utility. I could use a 
>loop to do the job (old FORTRAN/C habits die hard) but if I have a 
>big table in which I have to search for the values corresponding to 
>a vector, I end up logically with a double loop.
>Is there already such a utility? Otherwise, is there a way without loops?
>Thanks as always
>Anne Piotet
>Tel: +41 79 359 83 32 (mobile)
>Email: anne.piotet at m-td.com
>M-TD Modelling and Technology Development
>CH-1015 Lausanne
>Tel: +41 21 693 83 98
>Fax: +41 21 646 41 33
>	[[alternative HTML version deleted]]
>R-help at stat.math.ethz.ch mailing list
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Don MacQueen
Environmental Protection Department
Lawrence Livermore National Laboratory
Livermore, CA, USA

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