Dear Thomas, Thanks a lot for your extensive answer. Heinz At 08:53 09.09.2005 -0700, Thomas Lumley wrote: >On Fri, 9 Sep 2005, Heinz Tuechler wrote: >> Dear Martin, >> Thank you for your answer. As I said, I appreciate this change. The >> documentation does not explain precisely, how variables with labels are >> treated now. It only tells "If SPSS value labels are converted to factors >> the underlying numerical codes will not in general be the same as the SPSS >> numerical values, since the numerical codes in R are always 1,2,3,...". >> Will now the created factor levels in any case be ordered according to the >> order of the original numerical codes in SPSS? > >We don't know. We think so, based on a reasonable amount of >experimentation, but the file format isn't documented. We do know that >the numerical codes R uses will always be 1,2,3,... so that there is no >hope for having the same codes as SPSS unless the SPSS codes were also >1,2,3... > >> In general I wonder, how I could get to know such critical changes before I >> update a package instead of finding it out by chance. Is there a place, >> where a responsible R-user should look, when updating the program? > >Many packages have a NEWS or ChangeLog file describing changes. You would >typically have to look at the source package to find them, since by Unix >tradition they are usually in the top-level directory and so are not >included in the binary build. > >The foreign package is on svn.r-project.org, so you can see its Changelog >there. There have been suggestions to extract these files and put them in >the CRAN listing, but one obstacle is the lack of standardisation. > > -thomas > >
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