如果在因素方面节省费用,则没有读数。 颜色被变换成有等级的因素,现在又具有特征。
原文：Does R not read csv s as they were saved with respect to factors? Columns were mutated to factors with levels and are now characters again
原文：Does R not read csv s as they were saved with respect to factors? Columns were mutated to factors with levels and are now characters again
I m 基本上使用500多万行的大型电子表格,并用2个字体组成2个字体,以在数据集中形成各种因素和程度——一个栏目——......