Generate a random matrix without repeating any value in row and column.

How can I generate a random matrix without repeating any value in row and column. form "randi" function.

If we generate a matrix.

then the answer may be like this

randi(4,4)

ans =

4 2 3 1

3 4 1 2

1 3 2 4

2 1 4 3

this is just for example not generated matrix.

I have used the "unique" function. by this i can control the repeatition in row only.

Answer 1

[Bruno Luong]

A=mod((0:3)+(0:3)',4)+1;
R=A(randperm(end),randperm(end))

R = 4×4

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

[Pool]

Is it possible to make this into a 16x4 matrix? with fixed, non-random values?

A=mod((0:3)+(0:15)',2)+1;
r=A(randperm(end),randperm(end))

s=zeros(16,4);
% t=zeros(16,4);

r(r==2)=5;

This does not make unqieu arrays though

[Bruno Luong]

@Pool It's not possible : You can never have unique values on 16 rows and 4 colums with only 2 values.