Dear R users,
I have created a package and would like to check it for CRAN/R-Forge
submission. I use some parallelized code with the help of foreach and doMC.
R CMD check now gives me a warning even though my code is correctly
programmed (at least I think that it is). The following dummy function
inside a package produces the error:
dummy = function() {
dummyfun = function(iter) {
iter * 2
}
registerDoMC(4)
results = foreach(i = 1:10) %dopar% dummyfun(iter = i)
}
R CMD check --as-cran mypackage
now gives:
dummy: no visible binding for global variable ‘i’
It is clear that i can not be found as only the call to foreach creates
it (similar to a for loop), but should not the R check consider this? Or
is my programming poor? Setting i to any arbitrary value before running
foreach makes the error disappear, but this would feel as a really dirty
hack.
Cheers
Jannis