Hi, 1) I think vector subscripting is faster than the solution below.
2) I don't understand the question, but it may be an idea to look at ?tableSlice and ?tableMargin in the gRbase package. Regards Søren ________________________________________ Fra: r-help-boun...@r-project.org [r-help-boun...@r-project.org] På vegne af Steve Jaffe [sja...@riskspan.com] Sendt: 5. august 2009 04:45 Til: r-help@r-project.org Emne: Re: [R] array slice notation? 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 > -- View this message in context: http://www.nabble.com/array-slice-notation--tp24814643p24819883.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.