x, formula       
a data frame or a matrix of predictors, or a formula describing the model to be fitted (for the print method, an randomForest object).

y       
A response vector. If a factor, classification is assumed, otherwise regression is assumed. If omitted, randomForest will run in unsupervised mode.

Aharach 发表于 2014-5-29 05:19
-5 表示除了第5列的所有数据。

斜白 发表于 2014-5-29 12:09
还是没怎么懂，一句话里怎么有[,-5]又有[,5]