#Here's the basics to do parallel computing in R

library(doSNOW)
cl = makeCluster(2, type = "SOCK")
#cl = makeCluster(c(rep("cypress",6),rep("baker",6),rep("seymour",6),rep("grouse",6)), type = "SOCK")
registerDoSNOW(cl)

# Sequential
foreach(i = 1:10)%do%{
    expensiveFunction()
}

# Parallel
foreach(i = 1:10)%dopar%{
    expensiveFunction()
}

stopCluster(cl)