Importing function that is previously imported by other package
On 13-09-06 5:36 AM, Ulrike Gr?mping 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