Clustering large data

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/