foreach是否以某种方式抑制了stdout和stderr?我无法通过以下任一渠道收到任何消息:
require(foreach)
require(doParallel)
cl <- makeCluster(4)
registerDoParallel(cl)
r <- foreach (i = 1:4) %dopar% {
for (j in 1:2) {
cat("****\n")
message("****\n")
flush.console()
Sys.sleep(1)
}
cat("\n")
}