就像楼上说的
> A <- matrix(sample(c(0, 1), 20, replace = T), 4, 5)
> B <- matrix(sample(c(0, 1), 20, replace = T), 4, 5)
> A
[,1] [,2] [,3] [,4] [,5]
[1,] 1 1 1 0 1
[2,] 0 1 1 0 0
[3,] 0 1 0 1 0
[4,] 0 1 0 1 0
> B
[,1] [,2] [,3] [,4] [,5]
[1,] 1 1 1 0 1
[2,] 0 1 1 0 0
[3,] 1 0 0 0 1
[4,] 0 0 0 1 0
> A * B
[,1] [,2] [,3] [,4] [,5]
[1,] 1 1 1 0 1
[2,] 0 1 1 0 0
[3,] 0 0 0 0 0
[4,] 0 0 0 1 0