The release of R 2.4.0 is imminent, and will involve major changes in the handling of objects of classes defined in the sp package. Please make sure to export any objects you need to use to external files before upgrading to R 2.4.0, then upgrade and update packages. The 0.9-* series of the sp package are for R >= 2.4.0, 0.8-* for R <= 2.3.1.
This warning applies to users who save sp objects using save() or save.image(), that is save them in their internal form. It is this form that is being changed because of improvements in the core methods package, so the advice given here is unavoidable. Since this incompatibility is happening anyway, we have taken the opportunity of changing the representation of the data slot in SpatialPointsDataFrame, SpatialPixelsDataFrame and SpatialGridDataFrame objects from AttributeList to data.frame, because the handling of row names in the R core data.frame object has been improved for objects with many rows. -- Roger Bivand Economic Geography Section, Department of Economics, Norwegian School of Economics and Business Administration, Helleveien 30, N-5045 Bergen, Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43 e-mail: [EMAIL PROTECTED] _______________________________________________ R-sig-Geo mailing list R-sig-Geo@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo
