[R] writing a package with doParallel and compiled C

[Jeff Newmiller]

I am going to go out on a limb and suggest that you not do this at all. Packages are good places for algorithms, and parallel processing is an infrastructure optimization that a) is not always an efficiency win, and b) can be quite sensitive to the actual infrastructure that is available (best solutions for Windows and *nix platforms often being noticeably different).
If you have considered this already and still intend to proceed, I have to defer to someone else for an answer to your actual question.
---------------------------------------------------------------------------
Jeff Newmiller                        The     .....       .....  Go Live...
DCN:<jdnewmil at dcn.davis.ca.us>        Basics: ##.#.       ##.#.  Live Go...
                                      Live:   OO#.. Dead: OO#..  Playing
Research Engineer (Solar/Batteries            O.O#.       #.O#.  with
/Software/Embedded Controllers)               .OO#.       .OO#.  rocks...1k
--------------------------------------------------------------------------- 
Sent from my phone. Please excuse my brevity.

On April 26, 2014 11:52:18 AM PDT, Adam Clark <atclark at umn.edu> wrote:
>Hi all,
>
>Any tips on how to use doParallel as part of a function in a package
>that I
>am writing? The function calls compiled C code, and (as far as I know),
>doParallel requires you to load C functions for each core that you use
>(either with the .packages argument to foreach(), or by explicitly
>loading
>the object for each loop).
>
>However - the package doesn't pass the "check" command when I try to
>build
>it. I suspect that this is because the package isn't yet loaded into
>the
>namespace while it is being checked, and doParallel can therefore not
>find
>it.
>
>Does anyone know whether my suspicion is wrong, or whether there is a
>better way to handle doParallel in this case?
>
>Many thanks,