using parallel's parLapply: unable to access variables within parallel code

Question

I recently got a computer with several cores and am learning to use parallel computing. I\'m fairly proficient with lapply and was told parLapply

Answer 1

You need to export those variables to the other R processes in the cluster:

cl <- makeCluster(mc <- getOption("cl.cores", 4))
clusterExport(cl=cl, varlist=c("text.var", "ntv", "gc.rate", "pos"))