library(tree)

library(ISLR)

attach(Carseats)

High=ifelse(Sales<=8,”No”,”Yes”)

Carseats=data.frame(Carseats,High)

Carseats=data.frame(Carseats,High)

Error in data.frame(Carseats, High) : 找不到对象'High'

>

R刚入门，请指教，谢谢！