> Thanks for your responses. The biggest problem seems to be cast() for > the reshape package which could not handle the dataset. Peter's solution > using the mefa package worked fine. I found an other solution: table() > which works fine to crosstabulate presence-only data.
Exactly what error did you get? Or did it just take a very long time and then you gave up? I have an experimental rewrite of the reshape package that is more memory efficient and much faster (10 - 20x) - however, it's still some time from being ready for production use. Hadley -- http://had.co.nz/ _______________________________________________ R-sig-ecology mailing list R-sig-ecology@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-ecology
