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On Fri, 11 May 2007, frederic.gosselin at cemagref.fr wrote:
Full_Name: fr?d?ric Gosselin Version: 2.5 & 2.2.1 OS: windows XP pro Submission from: (NULL) (195.221.118.52) (i) I cannot read .Rdata saved with R2.5 with R2.2.1. I think it was the same with R2.4 vs R2.2.1.
If you use new features in 2.5.0 (sic) then that is not a bug. We do not claim forwards compatibility of formats (that is that R 2.2.1 can read files written in later versions of R). Without a reproducible example there is nothing more to add.
(ii) I have found the strange following problem, using the dump function: dump(ls(),"text.txt") in the text.txt file, there are a lot of "L" added at the end of numbers, particularly in the .Dim attributes. This makes the file undreadable (at least in R2.2.1 but alos probably in S-Plus...)
Please do read the help page: it points you to ?.deparseOpts for options for backwards and S-PLUS compatibility. The file is readable in R >= 2.5.0 and moreover is a more accurate representation than before.
I do not know in which respect both potential bugs are related.
Only in that the same user misunderstood both.
Brian D. Ripley, ripley at stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 --27464147-1671525898-1179141186=:28940--