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library(foreach)
library(doParallel)
data (iris)

### 18 sub datasets
  N<-18
  iris_dataset<-list()
    for (i in 1:N) {iris_dataset[[i]]<-iris[sample(1:10, 1):sample(75:150, 1),]}


  j48_c.models <-list()
  cl<-makeCluster(8)
  registerDoParallel(cl)

  j48_c.models<-foreach(i=1:N, .combine='rbind') %dopar% {
    library (RWeka)
    J48(Species ~ ., data = iris_dataset[[i]], control = Weka_control(M = 30, C = 0.05)) }

  stopCluster(cl)

我收到以下错误：

Error in summary.connection(connection) : invalid connection

我想创建并行模型（J48）。这样将为每个子数据集建立一个模型。例如，对于iris_dataset[[1]]J48 将是j48_c.models[[1]]... 而对于iris_dataset[[18]]J48 将是j48_c.models[[18]].

您可以通过以下方式单独运行模型：

> model<-J48(Species ~ ., data = iris_dataset[[1]], control = Weka_control(M = 30, C = 0.05))
> model
J48 pruned tree
------------------

Petal.Width <= 0.6: setosa (46.0)
Petal.Width > 0.6
|   Petal.Width <= 1.7: versicolor (54.0/5.0)
|   Petal.Width > 1.7: virginica (36.0/1.0)

Number of Leaves  :     3

Size of the tree :  5
4

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