[R] Help with "split".

Peter Dalgaard p.dalgaard at biostat.ku.dk
Thu Feb 25 13:13:24 CET 2010


rkevinburton at charter.net wrote:
> I read in the documentation for split:
> 
> ‘split’ divides the data in the vector ‘x’ into the groups defined by ‘f’. 
> 
> But I am still unclear as to its function. Take for example:
> 
> x <- 1:4
> split(x, c(0,1))
> $`0`
> [1] 1 3
> 
> $`1`
> [1] 2 4
> 
> I am not clear on how this result is reached.

Usual recycling rule: Same result as split(x, c(0,1,0,1)).



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    O__  ---- Peter Dalgaard             Øster Farimagsgade 5, Entr.B
   c/ /'_ --- Dept. of Biostatistics     PO Box 2099, 1014 Cph. K
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