[R] random discrete from the first tuple

[Xiyan Lon]

Dear UseR
I have a dataset, for instance x1(A, B, C), x2(M,F),
x3(X1,X2,X3,X4) and x4(W,F,P). I want to make a small
dataset with the random tuple. I know package e1071
can handle a random discrete,

> library(e1071)
> x1 <- rdiscrete(6, c(2,2,2),c("A","B","C"))
> x2 <- rdiscrete(6, c(3,3),c("M","F"))
> x3 <- rdiscrete(6,
c(2,2,1,1),c("X1","X2","X3","X4"))
> x4 <- rdiscrete(6, c(2,2,2),c("W","F","P"))
> x  <- data.frame(cbind(x1,x2,x3,x4))
> x
 x1 x2 x3 x4
1  C  F X1  F
2  B  M X2  F
3  A  F X2  W
4  A  F X2  F
5  C  M X3  P
6  A  F X1  F
>

but I want to make from the first tuple only one
variable change to next tuple,

C  F  X1  F
B  F  X1  F
A  F  X1  F
C  M  X1  F
B  M  X1  F
A  M  X1  F
C  F  X2  F
B  F  X2  F
A  F  X2  F
C  M  X2  F
B  M  X2  F
A  M  X2  F
.
.
.
Are there any package can handle this problem.

Xiyan Lon