Tom, please try to use the variogram function in package gstat; it doesn't (try to) store all pairwise differences, but rather accumulates them for distance intervals.
It will take a while to do this, and there is a chance that you overflow the counter that keeps the number of point pairs for each interval: 304000^2 > 2^32; it is stored as a C long, so may work on a 64 bit architecture. Otherwise, I'd suggest to sample your data set. I'd be interested to hear whether you succeed (or not). -- Edzer ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
