[Rd] initialization of S4 classes/methods

[A.J. Rossini]

I'm seeing weird issues in methods initialization, i.e. loading
marrayClasses loads Biobase, and when explicitly done, as in

   library(Biobase)
   library(marrayClasses) 

is fine, but when Biobase is loaded via a require statement in
marrayClasses' .First.Lib, I end up with:

  Warning message: In the method signature for function "coerce", class
  "exprSet" has no current definition in: matchSignature(signature,
  fdef, where) 

and based on the "band-aid" working above, suggests an initialization
or evaluation timing problem.

(and exprSet is defined in the Biobase package).

best,
-tony

-- 
rossini at u.washington.edu            http://www.analytics.washington.edu/ 
Biomedical and Health Informatics   University of Washington
Biostatistics, SCHARP/HVTN          Fred Hutchinson Cancer Research Center
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