R help - Dec 2008 - Problem with package SNOW on MacOS X 10.5.5

Hello All,

I can run the "lower level" functions OK, but many of the higher level
(eg. parSApply) functions are generating errors.

When running the example (from the snow help docs) for parApply on
MacOSX 10.5.5, I get the
following error:


cl <- makeSOCKcluster(c("localhost","localhost"))
sum(parApply(cl, matrix(1:100,10), 1, sum))

Error in do.call("fun", lapply(args, enquote)) :
  could not find function "fun"



Any ideas? Do I possibly need MPI or PVM to run the "Apply" functions?

Thanks,

-- 
Gregory Riddick, PhD.
CRTA Research Fellow

National Institutes of Health
National Cancer Institute, Neuro-Oncology Branch
9030 Old Georgetown Road
Building 37, Room 1142
Bethesda, MD 20892-8202

Phone: 301-443-2490

I don't see this on my setup (OS X 10.5.6, R 2.8.0, snow 0.3-3).  As
snow does not use a name space it is possible that something else you
have loaded is masking a snow internal function.  Another possibility
might be that your worker processes are picking up different versions
of R or snow.  You might look at what traceback() says and/or use
clusterEvalQ to query the workers for R and snow versions.

luke

On Wed, 31 Dec 2008, Greg Riddick wrote:
> Hello All,
>
> I can run the "lower level" functions OK, but many of the higher
level
> (eg. parSApply) functions are generating errors.
>
> When running the example (from the snow help docs) for parApply on
> MacOSX 10.5.5, I get the
> following error:
>
>
> cl <- makeSOCKcluster(c("localhost","localhost"))
> sum(parApply(cl, matrix(1:100,10), 1, sum))
>
> Error in do.call("fun", lapply(args, enquote)) :
>  could not find function "fun"
>
>
>
> Any ideas? Do I possibly need MPI or PVM to run the "Apply"
functions?
>
> Thanks,
>
>
-- 
Luke Tierney
Chair, Statistics and Actuarial Science
Ralph E. Wareham Professor of Mathematical Sciences
University of Iowa                  Phone:             319-335-3386
Department of Statistics and        Fax:               319-335-3017
    Actuarial Science
241 Schaeffer Hall                  email:      luke at stat.uiowa.edu
Iowa City, IA 52242                 WWW:  http://www.stat.uiowa.edu