Hi!
In the R directory of the package I have several files. This is because i defined
several classes and I like to store each class in separate file.
There is a inheritance defined between those classes.
eg calibrestat (defined in file calibrestat.R) extends (contains) calibstat (defined
in file calibstat.R)
While running R CMD check on package I get the following platform (windows/linux) and
version (2.0/1.9.1) idependent error.
* checking S3 generic/method consistency ... WARNING
Error in .tryQuietly({ : Error in methodsPackageMetaName("C", name) :
The name of the object (e.g,. a class or generic function) to find in the
meta-data must be a single string (got an object of class "NULL")
Was trying then to point it down and observed the following.
A) If I remove all files except calibstat.R where the superclass is defined * checking
S3 generic/method consistency ... OK
B) If I append the content of calibrestat.R >> calibstat.R then * checking S3
generic/method consistency ... OK
So it seems the error are because R dont knows how to build the package - in which
order to append the files.
My questions.
0) Is it something totally different that I think?
1) Is there a way to tell R in which order to merge the files (build(?) the package)
(eg. by naming the file a_calibstat.R - b_calibrestat.R - to indicicate in which
order should they be loaded.)
I think that this is solution with which I can live with.
2) Is it intended to implement in future versions mechanisms which automatically will
resolve the class dependencies?
3) Or have I to put all the classes in one file by hand and think about it as one of
the many features by which R supports package development?
Yours
Eryk.
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