如何解决错误“as.data.frame.default(data) 中的错误：无法强制类‘“lm”’到 data.frame”
abc4 <- lm(Sales~., data=abc4) summary(abc4) abc5 <- lm(Sales~ T+June+July+August+September+October+November+December, data=abc4) summary(abc5) I'm trying to run regression. If I run the fi...