Permanent assignments
On Sat, 4 Feb 2006, Mikael Anderson wrote:
I was wondering if it is possible to have permanent assignments in R pretty much in the same sense that S-Plus works.
It is not possible (a consequence of the scoping differences is that R objects are not self-contained). If you want S-PLUS, you know where to get it.
The reason I am asking this is that I was trying to load a FORTRAN subroutine to R and for some reason it didn't work and R crashed and I lost everything which I hadn't saved with save.image() or other similar functions. I tried adding on.exit(save.image()) to .Last() but it seems that if R crashes it doesn't get executed either.
Take a look at the R-devel version of R. That has a signal handler that allows you to save your work when it catches a segfault etc. Or you could ensure that you call save.image() before doing anything error-prone.
I am not saying that this should be the default behaviour in R but I was wondering if one could have this as an option in R as well. /Mikael PS. In case it matters, I run R 2.2.1 under sparc-sun-solaris2.9.
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