Replicating the SPlus "twoway" function
Is there a package somewhere that replicates the SPlus twoway() function? That function models a 2-d data matrix, which may contain NAs, as x[i,j] = grand.effect + row.effect[i] + col.effect[j] + resid[i,j] I'm sort of resurrecting some ancient S code and it would be handy if a twoway() function were available in R. I've googled and RSiteSearch'd, but maybe there's something out there that goes by another name? Thanks. --Todd -- Z. Todd Taylor Pacific Northwest National Laboratory Why are they called 'speed' bumps?