您可以获取通用名称，然后使用行绑定:

You could get the common names and then use row bind:

common <- intersect(names(x1), names(x2))
rbind(x1[,common], x2[,common])
     a c
row3 0 1
row4 1 0
row1 1 1
row2 1 1

匹配您的预期输出

 rbind(x2[,common], x1[,common])
     a c
row1 1 1
row2 1 1
row3 0 1
row4 1 0