R help - Sep 2012 - Help needed on parallel processing

Hi All,

If i have a vector say x<-1:10 and then use

parLapply(cl,x,function(k){k=k*2;  return(k);}

it works and will also parallel process depending on the number of cores
and the number of clusters I've built in cl.


My query is, if I want this function -

function(k1,k2){ s=k1+k2; return(s);}

to work using parallel processing what will be the procedure.



Thanks in advance.
Anindya

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Le mercredi 26 septembre 2012 ? 13:04 +0530, Anindya Sankar Dey a
?crit :
> Hi All,
> 
> If i have a vector say x<-1:10 and then use
> 
> parLapply(cl,x,function(k){k=k*2;  return(k);}
> 
> it works and will also parallel process depending on the number of cores
> and the number of clusters I've built in cl.
> 
> 
> My query is, if I want this function -
> 
> function(k1,k2){ s=k1+k2; return(s);}
> 
> to work using parallel processing what will be the procedure.
I think you should have a look at the clusterMap() function. It's the
parallel equivalent of mapply().


My two cents