# How to put different seed in a multidimensional matrix

2 views (last 30 days)
chan on 13 Jul 2022
Commented: KSSV on 14 Jul 2022
I have a multidimensional matrix where n=10, k=3
X = rand([n,k,n]);
How to put different seed number for each matrix
X(:,:,1)
X(:,:,2)
X(:,:,3)
.....
.....
X(:,:,10)
Thse seed no. for each matrix should be different.

KSSV on 13 Jul 2022
n = 10; k = 3 ;
R = zeros(n,k,n) ;
for i = 1:n
rng(i) % i can be a positive integer
R(:,:,i) = rand(n,k) ;
end
##### 2 CommentsShowHide 1 older comment
KSSV on 14 Jul 2022
Off course the number are random and they don't repeat.....also note that, there is no ncecessity to set seed for each iteration. You just need:
R = rand(10,3,10) ;

### More Answers (2)

Chunru on 13 Jul 2022
Not sure why you have to do this. But it can be done as follows:
n = 10; k=3;
X = zeros([n,k,n]);
seeds = [1:n]; % your seed numbers
for i=1:n
rng(seeds(i));
X(:, :, i) = rand(n, k);
end
##### 1 CommentShowHide None
chan on 13 Jul 2022
Edited: chan on 13 Jul 2022
Thank you for giving me the solution but i dnt want the random no. to be repeated for every run. How to do that?

Steven Lord on 13 Jul 2022
You might think that by changing the seed so frequently you're making the numbers "more random". You're not, as stated by the Note on this documentation page.
Call rng once before you start generating random numbers. Generate your numbers. Then if you need a different seed for your next run call rng again with a different seed.

R2016a

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