> installed.packages(caret) Error in installed.packages(caret) : object 'caret' not found
> installed.packages(caret)
Error in installed.packages(caret) : object 'caret' not found
為什么是錯(cuò)誤?
> installed.packages(caret)
Error in installed.packages(caret) : object 'caret' not found
為什么是錯(cuò)誤?
2017-04-23
舉報(bào)
2017-04-24
少了雙引號(hào)