Skip to content

[R-pkg-devel] could not find function "%dopar%"

2 messages · Mohammad Ali Nilforooshan

Original
Mohammad Ali Nilforooshan
# 
One of my functions does parallel processing with "doParallel" and
"foreach". "foreach" is a dependency to "doParallel". My R package keeps
failing, because %dopar% is not recognized as a function. I tried
%foreach::dopar%, %parallel::dopar% , %doParallel::dopar%, and
%iterators::dopar%. It didn't help!

In DESCRIPTION, I have:

Suggests:
   dpParallel (>= 1.0.14)

I want it to be "suggested" rather than a dependency.
Following is the example function. To make sure that it is working, try
library("doParallel").

myfunc = function(n) {
   if(requireNamespace("doParallel", quietly=TRUE))
   {
      cl = parallel::makeCluster(2)
      doParallel::registerDoParallel(cl)
      Q = foreach::foreach(i=1:n, .combine='cbind') %dopar% rep(i, 5)
      parallel::stopCluster(cl)
      return(Q)
   } else {
      print("Package doParallel is required.")
   }
}

Your help is really appreciated!
Mohammad Ali Nilforooshan
# 
Problem solved!
`%dopar%` <- foreach::`%dopar%`


One of my functions does parallel processing with "doParallel" and