[R] array slice notation?

Steve Jaffe sjaffe at riskspan.com
Wed Aug 5 04:45:55 CEST 2009


Very nice. Two questions:
1> Do you have any idea of the timing difference, if any, between this and
the vector-subscripting method?
2> How do  you generalize this to select multiple rows eg with indexes given
by a vector 'v'?


Søren Højsgaard wrote:
> 
> You can do 
>> A <- HairEyeColor
>> do.call("[", c(list(A),list(1,T,T)))
>        Sex
> Eye     Male Female
>   Brown   32     36
>   Blue    11      9
>   Hazel   10      5
>   Green    3      2
> 
> Regards
> Søren
> 

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