我在R中使用verbose模式(do.trace)运行randomForest,想知道消息中列的含义。我可以看到ntree
是树的数量,OOB
是袋外样本的百分比,但是“1”和“2”是什么意思?
> rf.m <- randomForest(x = X.train, y=as.factor(y.train), do.trace=10)
ntree OOB 1 2
10: 32.03% 15.60% 82.47%
20: 29.18% 10.51% 86.31%
30: 27.44% 7.47% 88.57%
40: 26.48% 5.29% 91.33%
50: 25.92% 4.35% 91.96%
....