📅  最后修改于: 2022-03-11 14:52:01.012000             🧑  作者: Mango
代码示例1
M
a b c
1[1,] 1 4 7
2[2,] 2 5 8
3[3,] 3 6 9
row.names(M)<- NULL ; colnames(M)<- NULL
M
[,1] [,2] [,3]
[1,] 1 4 7
[2,] 2 5 8
[3,] 3 6 9