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2003 Jul 07
2
(PR#3427)
...0 11250 275000 7106250 1.906250e+08 [3,] 11250 275000 7106250 190625000 5.247656e+09 [4,] 275000 7106250 190625000 5247656250 1.471719e+11 [5,] 7106250 190625000 5247656250 147171875000 4.184754e+12 solve(t(xxmodel)%*%(xxmodel)) Yields the following massage: Error in solve.default(t(xxmodel) %*% (xxmodel)) : singular matrix `a' in solve The above 5X5 matrix is invertible. It has non-zero eigenvalues. Could someone explain whether there is a problem in R's solve() function. Dursun Bulutoglu