[Rd] Imports/exports of S4 methods
Roger D. Peng
rpeng at jhsph.edu
Thu May 3 23:13:49 CEST 2007
I have a question about what to do in the following situation (please bear with
Package A defines an S4 generic 'foo' and as well as S4 methods for 'foo' and has
in its NAMESPACE file.
Package B defines another method for 'foo' for class "bar" and has
in its NAMESPACE file. Should Package B also have Package A in the 'Depends:'
field of the DESCRIPTION file or is it correct to import Package A only?
Finally, Package C has a single exported function named 'myfunc' which needs to
use the method for 'foo' defined in Package B, so its NAMESPACE file has
Is this the correct thing to do?
The error I get under this setup is that 'myfunc' cannot find the method for
'foo' defined in Package B when 'myfunc' calls 'foo' on an object of class "bar".
If you've made it this far I'm already grateful! Any help with this would be
Roger D. Peng | http://www.biostat.jhsph.edu/~rpeng/
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