I am not an expert here, but if it's a package, couldn't (shouldn't?) you
include Package B in one of the Depends: or Imports: lines in the
DESCRIPTION file? That would ensure Package B is automatically made
accessible whenever Package A is loaded. For example, see the Writing R
Extensions manual:

http://cran.fhcrc.org/doc/manuals/r-release/R-exts.html#Package-Dependencies


Chris Green
Ph.D. Student, Statistics
University of Washington, Seattle




On Thu, Aug 7, 2014 at 4:35 PM, Joshua Wiley <jwiley.psych@gmail.com> wrote:

> Dear All,
>
> What is the preferred way for Package A, to initialize a cluster, and load
> Package B on all nodes?
>
> I am writing a package that parallelizes some functions through the use of
> a cluster if useRs are on a Windows machine (using parLapply and family).
>  I also make use of another package in some of my code, so it is necessary
> to load the required packages on each slave once the cluster is started.
>
> Right now, I have done this, by evaluating require(packages) on each slave;
> however, Rcmd check has a note that I should remove the "require" in my
> code.
>
> Thanks!
>
> Josh
>
> --
> Joshua F. Wiley
> Ph.D. Student, UCLA Department of Psychology
> http://joshuawiley.com/
> Senior Analyst, Elkhart Group Ltd.
> http://elkhartgroup.com
> Office: 260.673.5518
>
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