相关疑难解决方法(0)

我想从这个数据集创建虚拟变量:

DF<-structure(list(A = c(1, 2, 3, 4, 5), B = c("1,3,2", "2,1,3,6", 
  "3,2,5,1,7", "3,7,4,2,6,5", "4,10,7,3,5,6")), .Names = c("A", "B"), 
              row.names = c(NA, 5L), class = "data.frame")
> DF
  A                  B
1 1              1,3,2
2 2            2,1,3,6
3 3          3,2,5,1,7
4 4        3,7,4,2,6,5
5 5       4,10,7,3,5,6

期望的输出应该如下所示:

A  1  2  3  4  5  6  7  8  9  10
1  1  1  1  0  0  0  0  0  0  0
2  1  1  1  0  0  1  0  0  0  0
3 …