I work very mutch with the packages RWeka and multicore. If you try to run
J48 or any tree of RWeka with multicore we hava some errors.
Example I:
library(RWeka);
library(multicore);
mclapply(1:100, function(i) {
J48(Species ~., iris);
});
Output: "Error in .jcall(o, \"Ljava/lang/Class;\", \"getClass\") : \n
java.lang.ClassFormatError: Incompatible magic value 1347093252 in class
file java/lang/ProcessEnvironment$StringEnvironment\n"
Example II:
library(multicore);
mclapply(1:100, function(i) {
RWeka::J48(Species ~., iris);
});
Output: Erro em .jcall(x$classifier, "S", "toString") :
RcallMethod: attempt to call a method of a NULL object.
Do you know some way to work with parallel processing and RWeka? I tried
MPI and SNOW without success.
R version 3.0.2 (2013-09-25) -- "Frisbee Sailing"
Ubuntu 12.04 x64
--
Luís Paulo Faina Garcia
Engenheiro de Computação - Universidade de São Paulo
São Carlos - SP - Brasil
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