[R] snow: cluster initialization

[Jon Olav Skoien]

I dont think this has anything to do with the snow package, you should 
rather start by checking what is the output of system('nproc') is on 
your computer, and also whether it is possible to assign this to a 
variable. I tried on a redhat linux (R 2.15.0) server:

 > ncore = system('nproc')
16
 > ncore
[1] 0
# the result is printed, not returned


Best wishes,
Jon

On 18-Apr-13 10:52, Kaiyin Zhong (Victor Chung) wrote:
> Dear all,
>
> I found a strange thing with the snow package.
>
> This will work:
> y = matrix(1:4, 2)
> cl = makeCluster(rep('localhost', 8), type='SOCK')
> parMM(cl, y, y)
>
> This will not:
>
> y = matrix(1:4, 2)
> ncore = system('nproc')
> parMM(cl, y, y)
> Error in cut.default(i, breaks) : invalid number of intervals
>
> I also tried:
> cl = makeCluster(rep('localhost', ncore), type='SOCK')
> cl = makeCluster(rep('localhost', as.integer(ncore)), type='SOCK')
>
> no luck.
>
>
> Could anyone please help? Thanks!
>
>
>
>
>
>
> Best regards,
>
> Kaiyin ZHONG
> ------------------------------
> FMB, Erasmus MC
> k.zhong at erasmusmc.nl
> kindlychung at gmail.com
>
> 	[[alternative HTML version deleted]]
>
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-- 
Jon Olav Skøien
Joint Research Centre - European Commission
Institute for Environment and Sustainability (IES)
Land Resource Management Unit

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