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The asymptotic regression model is often used in the analysis of NDF digestion data but the usual parameters are very highly correlated. This package uses an alternative set of parameters  the expected responses at 24, 36 and 48 hours  that are more stable. For reasons we have now forgotten we called these Grho.
Package details 


Author  Douglas Bates and John Goeser 
Maintainer  Douglas Bates <[email protected]> 
License  GPL (>=2) 
Version  0.2 
Package repository  View on RForge 
Installation 
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