outer函数欢迎您
[code]
outer(1:10, 1:5, FUN = '-')
[\code]
> outer(1:10, 1:5, FUN = '-')
[,1] [,2] [,3] [,4] [,5]
[1,] 0 -1 -2 -3 -4
[2,] 1 0 -1 -2 -3
[3,] 2 1 0 -1 -2
[4,] 3 2 1 0 -1
[5,] 4 3 2 1 0
[6,] 5 4 3 2 1
[7,] 6 5 4 3 2
[8,] 7 6 5 4 3
[9,] 8 7 6 5 4
[10,] 9 8 7 6 5