[R] Fixed Correlation Matrices in gee package

Laura Gross laura at bayesian-bay.freeserve.co.uk
Wed Jan 8 12:19:02 CET 2003

Dear List

I am using the gee package and want to specify my own correlation
structure using the corstr(fixed) option.

Can anybody advise me how exactly I need to define the structure I want?
Do I create a matrix myself? How can I get the command to realise it
needs to use my own matrix?

Many thanks

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