Confirmed behavior on R version 2.10.1 Patched (2010-01-12 r50990) and R version 2.11.0 Under development (unstable) (2010-02-14 r51138) [Windows Vista]:
INTEGERS: > v <- integer(5) > v [1] 0 0 0 0 0 > v[[2]] <- integer(0) > v [1] 0 2892960 0 0 0 > v[[4]] <- 1L[c()] > v [1] 0 2892960 0 2892960 0 > str(v) int [1:5] 0 2892960 0 2892960 0 DOUBLES: > u <- integer(5) > u [1] 0 0 0 0 0 > u[[2]] <- integer(0) > u [1] 0 2892960 0 0 0 > u[[4]] <- 1L[c()] > u [1] 0 2892960 0 2892960 0 > str(u) str [1:5] 0 2892960 0 2892960 0 > u[[5]] <- double(0) > u [1] 0.000000e+00 3.487453e+07 0.000000e+00 3.487453e+07 4.261222e-314 > str(u) num [1:5] 0.00 3.49e+07 0.00 3.49e+07 4.26e-314 The actual "rubbish" values are the same within each R session, but differ between R sessions. Certain looks like stray memory cells are assigned. Wanted behavior should probably be: > u[[5]] <- double(0) Error in u[[5]] <- double(0) : replacement has length zero cf. u[5] <- double(0) and > u[[5]] <- double(5) Error in u[[5]] <- double(5) : more elements supplied than there are to replace /Henrik On Fri, Feb 19, 2010 at 1:45 PM, <g.russ...@eos-solutions.com> wrote: > Full_Name: George Russell > Version: 2.10.0, 2.11.0 (2009-12-13 r50716) > OS: Windows > Submission from: (NULL) (217.111.3.131) > > > R trace: > -- cut here -- >> v <- integer(0) >> v[[1]] <- v >> v > [1] 20522144 >> v <- numeric(0) >> v[[1]] <- v >> v > [1] 4.254131e-314 >> sessionInfo() > R version 2.10.0 (2009-10-26) > i386-pc-mingw32 > > locale: > [1] LC_COLLATE=German_Germany.1252 LC_CTYPE=German_Germany.1252 > [3] LC_MONETARY=German_Germany.1252 LC_NUMERIC=C > [5] LC_TIME=German_Germany.1252 > > attached base packages: > [1] stats graphics grDevices datasets utils methods base > -- cut here -- > Clearly the assignments v[[1]] <- v do not do anything useful, the problem is > I > don't understand where the strange values left in v come from. > > The same problem occurs with the 2.11.0 release r50716 and --vanilla. For > vanilla in Windows CMD mode I get different values in v, but ones which are to > me equally strange. > > Many thanks for your help! > > George Russell > > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel > ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
