Prevent repeating number in a vector

Hi all, If I have any random matrix: [2 4 5 6 4] The number 4 is repeated here. I would like some help in being able to prevent this repeating. your help is appreciated. Hany

Answer 1

[Star Strider]

I am not certain what you want.

If you want a random matrix that prevents repeats, this works:

M = perms(unique([2 4 5 6 4]));

The randperm function is another option if you have a vector of non-duplicating numbers and you want the perumtations of it.

[hany salem]

M=round(rand(1,5).*(10-1)+1); I want to prevent any valeue from repeating.

[hany salem]

Thanks alot sir. The randperm function is okay.

[Star Strider]

My pleasure.

[hany salem]

If I have any random matrix: [2 4 5 6 4; 3 5 3 2 6] The numbers 4 and 3 are repeated in rows one and two, respectively. I would like some help in being able to prevent this repeating. The randperm function is okay for doing the requirement in vectors. Is it okay here in a matrix?

[Star Strider]

The randperm function only outputs vectors, so to create a matrix, you will have to use it in a loop. An alternative is the perms function.

You may have to explore the documentation (follow the links at the end of the randperm documentation page) to find the function that most closely approximates what you want to do.