On 13-09-06 5:36 AM, Ulrike Grömping wrote:
Dear developeRs,
I encounter the following problem: in the current version of my package
FrF2, certain calls to a functioni do not work when package combinat is
loaded, because function combn from combinat masks the function from
utils that my package uses.
I tried to solve this issue by importing function combn into the
namespace of FrF2; I don't need to export it, I just want to use it
internally in the package; I could of course find all occurrences and
replace them with utils::combn, but I thought that the namespace
solution would be more elegant, faster, and in the spirit of R
programming. The fix was successful: the installed package works with
combinat on the search path.
However, when installing or loading the modified FrF2, I now get the
warning "replacing previous import by utils::combn when loading 'FrF2'"
(that's on R-devel, on production R the wording is slightly different,
but there is also a warning). There is no warning from R CMD check,
however. In case this is relevant: None of the packages in my "Depends"
list mentions "utils" under depends, one of the packages FrF2 depends on
also imports from utils, including utils::combn.
Shouldn't it be possible to have several packages IMport a function of
the same name without a warning?
Best, Ulrike
I think we need to see the details. I don't get those warnings with the
version on CRAN. Perhaps you are importing it twice, e.g.
import(combinat)
importFrom(utils, combn)
?
Duncan Murdoch
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