根据公共列组合R中的两个数据帧

Question

我必须组合两个看起来像这样的数据帧我想在数据帧中采用公共列并将它们连接在一起.两个数据帧中的行将完全不同.

      a  b c 
row1  1  0 1      
row2  1  0 1

另一个数据帧

     d a c f
row3 1 0 1 1
row4 1 1 0 0 

我希望最终的数据集看起来像这样

        a c 
row1    1 1
row2    1 1
row3    0 1
row4    1 0

这是来自两个数据帧的输入

dput(x1)
structure(list(d = c(1L, 1L), a = 0:1, c = c(1L, 0L), f = c(1L, 
0L)), .Names = c("d", "a", "c", "f"), row.names = c("row3", "row4"
), class = "data.frame")

dput(x2)
structure(list(a = c(1L, 1L), b = c(0L, 0L), c = c(1L, 1L)), .Names = c("a", 
"b", "c"), row.names = c("row1", "row2"), class = "data.frame")

Answer 1

您可以获取常用名称,然后使用行绑定:

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

编辑: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