[R-pkg-devel] Rd cross-references ... NOTE, Undeclared packages ... in Rd xrefs

[Spencer Graves]

On 6/13/22 1:26 PM, Duncan Murdoch wrote:
> On 13/06/2022 12:12 p.m., Spencer Graves wrote:
>> Hello, All:
>>
>>
>>       How do I fix "Rd cross-references ... NOTE
>> Undeclared packages ‘EnvStats’, ‘drc’, ‘zoo’, ‘prodlim’, ‘plyr’,
>> ‘TRAMPR’, ‘raster’ in Rd xrefs"?
>>
>>
>>       This occurs with
>> "https://www.r-project.org/nosvn/R.check/r-devel-linux-x86_64-fedora-clang/Ecfun-00check.html" 
>>
>> and with
>> "https://www.r-project.org/nosvn/R.check/r-devel-linux-x86_64-fedora-clang/Ecdat-00check.html". 
>>
>>    However, this error is not raised on other platforms.  My search for
>> this note produced essentially the same message for other packages but
>> no advice on how to fix it.
>>
>>
>>       These are references to other packages that I do not use in my
>> packages but that some users may wish to consider.  If needed, I will
>> add them to "Suggests" for the packages.  However, that seems overkill,
>> because I do not use them myself.  ???
> 
> Section 2.5 of Writing R Extensions says "Packages referred to by these 
> ‘other forms’ should be declared in the DESCRIPTION file, in the 
> ‘Depends’, ‘Imports’, ‘Suggests’ or ‘Enhances’ fields."  Of those 
> fields, Suggests looks like the best fit.  You'd use Enhances if your 
> package provides "methods for classes from these packages, or ways to 
> handle objects from these packages".


Thanks.  I looked at "Writing R Extensions" but could not find anything 
that seemed to fit.  I probably should have just used "Suggests" and not 
bothered this list with this issue.  Thanks again, Spencer Graves

> 
> Duncan Murdoch