[R-pkg-devel] Advice on setAs - issue of "in method for 'coerce' with signature / no definition for classes

[Martin Morgan]

Since ncdf4 (and emld) both use S3 class systems, it is sufficient to simply declare

    setOldClass("ncdf4")

some time prior to using setAs() .

Martin

On 5/24/19, 6:41 PM, "R-package-devel on behalf of Emmanuel Blondel (GMAIL)" <r-package-devel-bounces using r-project.org on behalf of emmanuel.blondel1 using gmail.com> wrote:

    Dear all, I write here as i'm in process to submit a revision of 
    /geometa/ package to CRAN in which i've enabled some coercing methods 
    between main metadata object ISOMetadata from geometa, and foreign 
    metadata objects (from emld / ncdf4 packages)
    
    I've received a "pre-test archived" notification, because of the 
    folllowing warnings dealing with the coercing:
    
       Warning: in method for 'coerce' with signature '"ISOMetadata","emld"': no definition for classes "ISOMetadata", "emld"
       Warning: in method for 'coerce' with signature '"emld","ISOMetadata"': no definition for classes "emld", "ISOMetadata"
       Warning: in method for 'coerce' with signature '"ncdf4","ISOMetadata"': no definition for classes "ncdf4", "ISOMetadata"
    
    Detail at: 
    https://win-builder.r-project.org/incoming_pretest/geometa_0.5-0_20190524_153346/Windows/00check.log
    
    I've found this thread that seems to discuss the same matter: 
    https://github.com/r-spatial/sf/issues/129 . I'm facing the same 
    situation where there is no good reason enough to add emld, ncdf4 as 
    Imports, but rather to keep them as Suggests, as they are only used in 
    these specific converters. In the doubt, i prefer asking here if there 
    is some good practice to deal with these warnings, eventually to avoid 
    it, or if this is considered by CRAN team as false positive.
    
    Thanks a lot for your advice,
    
    Best,
    Emmanuel
    
    
    
    	[[alternative HTML version deleted]]
    
    ______________________________________________
    R-package-devel using r-project.org mailing list
    https://stat.ethz.ch/mailman/listinfo/r-package-devel