R-beta: slice.index in R

Peter Dalgaard BSA p.dalgaard at biostat.ku.dk
Wed May 27 17:48:01 CEST 1998

thor.thoresen at hlk.hj.se (Thor Thoresen) writes:

> I am currently trying to port a couple of S or S-plus add ons (Multiple
> imputation) to R.
> Since I do not have S or S-Plus it is a bit of a trial and error
> process. Most things though,
> run smooth. I encountered however a function "slice.index" for which I
> cannot find
> any R counterpart. I have searched the different available
> documentations such as the
> S-FAQ and S-Plus-notes with no luck.
> Do anyone know what this S-Plus function is supposed to accomplish and
> if there is
> any method to accomplish the same in R?

Here's the top of the help page:

       Returns an array  filled  with  integers,  each  of  which
       identifies  where  in  the current slice it is.  This is a
       generalization of the row and col functions: row(x) can be
       expressed  as slice.index(x,1) and col(x) can be expressed
       as slice.index(x,2).

Doesn't sound too hard to duplicate. Do you want to try? I think a
careful look at the sweep function might help....  

   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907

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