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names(X2) <- C("A","B","C","D") 返回的是 names(X2) <- C("A","B","C","D") Error in C("A", "B", "C", "D") : 不能把对象解释成因子 为什么啊
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names(X2) <- C("A","B","C","D") 返回的是 names(X2) <- C("A","B","C","D") Error in C("A", "B", "C", "D") : 不能把对象解释成因子 为什么啊
2016-07-30
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