Del Row Matrix R
> x <- matrix(1:9, nrow = 3, dimnames = list(c("X","Y","Z"), c("A","B","C")))
> x
A B C
X 1 4 7
Y 2 5 8
Z 3 6 9
Cheerful Cormorant
> x <- matrix(1:9, nrow = 3, dimnames = list(c("X","Y","Z"), c("A","B","C")))
> x
A B C
X 1 4 7
Y 2 5 8
Z 3 6 9
t1<- t1[-4:-6,-7:-9]
> cbind(c(1,2,3),c(4,5,6))
[,1] [,2]
[1,] 1 4
[2,] 2 5
[3,] 3 6
> rbind(c(1,2,3),c(4,5,6))
[,1] [,2] [,3]
[1,] 1 2 3
[2,] 4 5 6