Create Random Integer Matrix

General
1

Hi,

I am new with R.

Need Help on this. I would like to create a matrix of a random integer.

Example:

Currently, I am using "sample" function. This will create a matrix of integer but some integer values by row are similar.
3 2 4 1
4 1 3 2
1 3 1 3
2 4 2 4

Actually, I would like to generate this type of matrix:

3 2 4 1
4 1 3 2
1 3 2 4
2 4 1 3

Any idea of doing this. Really appreciate any help. Thanks.

2

Welcome to the community!

If I understand correctly, you want a permutation of 1, 2, 3, 4 in each row. You can do something like this:

set.seed(seed = 34824)

t(x = replicate(n = 4,
                expr = sample(x = 1:4)))
#>      [,1] [,2] [,3] [,4]
#> [1,]    4    1    3    2
#> [2,]    2    4    3    1
#> [3,]    4    3    2    1
#> [4,]    4    2    1    3

Created on 2019-07-08 by the reprex package (v0.3.0)

However, there is no guarantee that two rows won't be identical, and there is also no guarantee that each column will also be a permutation. Do you have these constraints too?