cheetahfly 发表于 2018-1-9 13:37 
dplyr::bind_rows(one, two)
1: In bind_rows_(x, .id) : Unequal factor levels: coercing to character
2: In bind_rows_(x, .id) :
binding character and factor vector, coercing into character vector
会出这种warning

.请问这种怎么看到底是哪一个变量出问题了呢