[R-sig-hpc] foreach() with 'lapply'?

[Brian G. Peterson]

On Thu, 2011-07-21 at 10:27 -0700, Megh Dal wrote:
> Dear all, I was exploring the "dopar" mechanism in foreach package, however it seems that "dopar" can be applied only in place of 'for' loop. Here my question is: can it be used with 'lapply' construct?
> 
> I have a big 'list' object and I am in some process to apply some complex custom made function on each element of that 'list' object. I have dual core windows vista system, and planning to break that list into 2 part of equal length, then apply that function simultaneously using both cores.
> 
> Can somebody throw some light how to achieve that?

Please read the documentation before posting.

foreach iterates over some iterator, as described in the package
vignette here:
http://cran.r-project.org/web/packages/foreach/vignettes/foreach.pdf

and that iterator may easily be a list.  In that case, foreach looks
very much like lapply.  

foreach will also, by default, return a list.  See the documentation
for .combine.

If you need additional help, please provide a minimal self-contained
example, per the posting guide.

Regards,

   - Brian

-- 
Brian G. Peterson
http://braverock.com/brian/
Ph: 773-459-4973
IM: bgpbraverock