> y<-read.table("nb_dim_item_cat.csv",header=TRUE,sep=",")
Error in file(file, "rt") : cannot open the connection
In addition: Warning message:
In file(file, "rt") :
cannot open file 'nb_dim_item_cat.csv': No such file or directory
错误在哪里呀,新手开始学习R,求大家指教,谢谢!
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