values of randi function repeat themselves

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while using the function randi that generate random integers uniformly disterbuted i sometimes get in the output vector the same numbers for example:
4 2 5 3 4 8 7 9 7 4
(the number 4 was three times in the row above)
how can i avoid this?
locTX=randi([1 20],1,4);

Accepted Answer

Azzi Abdelmalek
Azzi Abdelmalek on 30 Aug 2014
Edited: Azzi Abdelmalek on 30 Aug 2014
Use randperm function
  4 Comments
Kobi
Kobi on 31 Aug 2014
i use randi not randni
about the other quastion how does the random numbers distributed? uniformly?
Image Analyst
Image Analyst on 31 Aug 2014
rand() and randi() are uniform. randn() is normally/Gaussian distributed. You might want to edit your post (body and subject line) to get rid of randni to avoid confusing people with a function that you say you don't use.

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