[R] customizing covariance matrices

Kelly Lee leekell at gmail.com
Sat Jan 27 06:00:52 CET 2007

Hello R-users,
Does anyone know how to customize a corStruct object to be used in gls? 
I would either like to create the covariance matrix from scratch, or 
alter the diagonal elements of an existing corStruct object and pass 
that to gls.

Any ideas would be appreciated!

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