A potential bug for paste() ?
Theoph is in the datasets package, so it should be available in all versions of R:
class(Theoph)
[1] "nfnGroupedData" "nfGroupedData" "groupedData" "data.frame" The key to what's happening is that there are some methods for groupedData objects in the nlme library, which I suspect the original poster had loaded in Windows, but not Unix. Here's what I see on a Linux system:
all(paste(Theoph[1],Theoph[2])==paste(Theoph[[1]],Theoph[[2]]))
[1] FALSE
library(nlme) all(paste(Theoph[1],Theoph[2])==paste(Theoph[[1]],Theoph[[2]]))
[1] TRUE So if nlme is loaded, the following methods are available for groupedData objects:
methods(class='groupedData')
[1] as.data.frame.groupedData* asTable.groupedData*
[3] collapse.groupedData* formula.groupedData*
[5] [.groupedData* isBalanced.groupedData*
[7] lme.groupedData* lmList.groupedData*
[9] print.groupedData* update.groupedData*
Thus subscripting for these objects is performed differently when
the nlme package is loaded.
- Phil Spector
Statistical Computing Facility
Department of Statistics
UC Berkeley
spector at stat.berkeley.edu
On Thu, 7 May 2009, Gavin Simpson wrote:
On Thu, 2009-05-07 at 09:38 -0500, Jun Shen wrote:
Hi, everyone, Try the following command to see if you get TRUE or FALSE. I get FALSE on a unix platform but TRUE on Windows. Any comment? all(paste(Theoph[1],Theoph[2])==paste(Theoph[[1]],Theoph[[2]]))
And what is Theoph? Please do read the posting guide and provide a reproducible example. Is Theoph a list?
a <- list(A = rnorm(10), B = rnorm(10)) paste(a[1], a[2])
[1] "c(0.511810414967963, 0.165995305876871, 1.22637694512945, -0.496453787173788, 0.325876407556065, 1.97392856823209, -0.228962880984580, -0.172306887133861, -0.881280038259407, -0.216958955239245) c(-0.281058662811336, 0.918418337792562, -1.44005513590710, 0.22857441100305, 0.840138552938062, 0.0555436312146647, -0.602645008995437, -0.158866265592772, 0.959478898002479, -0.892389972305427)"
paste(a[[1]], a[[2]])
[1] "0.511810414967963 -0.281058662811336" [2] "0.165995305876871 0.918418337792562" [3] "1.22637694512945 -1.44005513590710" [4] "-0.496453787173788 0.22857441100305" [5] "0.325876407556065 0.840138552938062" [6] "1.97392856823209 0.0555436312146647" [7] "-0.228962880984580 -0.602645008995437" [8] "-0.172306887133861 -0.158866265592772" [9] "-0.881280038259407 0.959478898002479" [10] "-0.216958955239245 -0.892389972305427"
typeof(a[[1]])
[1] "double"
typeof(a[1])
[1] "list" If it is, note that [ and [[ do not return the same thing for a list and as such it is not surprising that they are not equal, pasted or otherwise. G -- %~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~% Dr. Gavin Simpson [t] +44 (0)20 7679 0522 ECRC, UCL Geography, [f] +44 (0)20 7679 0565 Pearson Building, [e] gavin.simpsonATNOSPAMucl.ac.uk Gower Street, London [w] http://www.ucl.ac.uk/~ucfagls/ UK. WC1E 6BT. [w] http://www.freshwaters.org.uk %~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%
______________________________________________ R-help at 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.