Sorry, I mixed my toy example to recreate the problem with the actual data set.
The 'crossRsorted' in the toy and in the actual are different. See my latest posting in this thread. - Godmar On Wed, Jul 8, 2009 at 11:55 AM, David Huffer<david.huf...@csosa.gov> wrote: > Godmar, > > I don't follow... > > > q <- list ( ) > > q [[ 105 ]] <- as.numeric ( c ( 0 , 0 , 1 ) ) > > q [[ 104 ]] <- as.numeric ( c ( 1 , 1 , 1 ) ) > > q [[ 10 ]] <- as.integer ( c ( 3 , 3 , 1 ) ) > > crossRsorted <- data.frame ( i = c ( 105 , 104 , 10 ) ) > > q [ crossRsorted [ , 1 ] ] > [[1]] > [1] 0 0 1 > > [[2]] > [1] 1 1 1 > > [[3]] > [1] 3 3 1 > > > length ( q [ crossRsorted [ , 1 ] ] ) > [1] 3 > > > > How'd you come up with > > > length(q) > [1] 165 > > length(q[ crossRsorted[,1] ]) > [1] 15750 > > I must be missing something. > > -- > David > > ----------------------------------------------------- > David Huffer, Ph.D. Senior Statistician > CSOSA/Washington, DC david.huf...@csosa.gov > ----------------------------------------------------- > > > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On > Behalf Of Godmar Back > Sent: Wednesday, July 08, 2009 9:58 AM > To: Henrique Dallazuanna > Cc: r-help@r-project.org; Petr PIKAL > Subject: Re: [R] error: no such index at level 2 > > On Wed, Jul 8, 2009 at 9:40 AM, Henrique Dallazuanna <www...@gmail.com>wrote: > >> Its because '[[' accept only element, so you need use '[': >> >> q[crossRsorted[,1]] >> > > This appears to be doing something different. For instance, my 'q' has 165 > components, but what you suggest has 15750: >> length(q) > [1] 165 >> length(q[ crossRsorted[,1] ]) > [1] 15750 > > hardly what I want. > > Meanwhile, it looks as though [[ ]] does not vectorize its arguments, it > curries them! > > Note that: > >> q[[c(105,104)]] > Error in q[[c(105, 104)]] : subscript out of bounds > > gives the same error as: > >> q[[105]][[104]] > Error in q[[105]][[104]] : subscript out of bounds > > Very mysterious, though, in all fairness, explained in help("[[") where it > says: > > '[[' can be applied recursively to lists, so that if the single > index 'i' is a vector of length 'p', 'alist[[i]]' is equivalent to > 'alist[[i1]]...[[ip]]' providing all but the final indexing > results in a list. > > which leads to square one: how to express "select all r[i] where q[[i]] > fulfills some predicate?" > > - Godmar > > [[alternative HTML version deleted]] > > ______________________________________________ > 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. > > > > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On > Behalf Of Godmar Back > Sent: Wednesday, July 08, 2009 9:58 AM > To: Henrique Dallazuanna > Cc: r-help@r-project.org; Petr PIKAL > Subject: Re: [R] error: no such index at level 2 > > On Wed, Jul 8, 2009 at 9:40 AM, Henrique Dallazuanna <www...@gmail.com>wrote: > >> Its because '[[' accept only element, so you need use '[': >> >> q[crossRsorted[,1]] >> > > This appears to be doing something different. For instance, my 'q' has 165 > components, but what you suggest has 15750: >> length(q) > [1] 165 >> length(q[ crossRsorted[,1] ]) > [1] 15750 > > hardly what I want. > > Meanwhile, it looks as though [[ ]] does not vectorize its arguments, it > curries them! > > Note that: > >> q[[c(105,104)]] > Error in q[[c(105, 104)]] : subscript out of bounds > > gives the same error as: > >> q[[105]][[104]] > Error in q[[105]][[104]] : subscript out of bounds > > Very mysterious, though, in all fairness, explained in help("[[") where it > says: > > '[[' can be applied recursively to lists, so that if the single > index 'i' is a vector of length 'p', 'alist[[i]]' is equivalent to > 'alist[[i1]]...[[ip]]' providing all but the final indexing > results in a list. > > which leads to square one: how to express "select all r[i] where q[[i]] > fulfills some predicate?" > > - Godmar > > [[alternative HTML version deleted]] > > ______________________________________________ > 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.
