Generate a rondom sequence

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abdulhakeem
abdulhakeem 2013-3-15
Greetings,
Please can any one help me about:
How to Generate Generate a random sequence Z ={(i, j)},
where i, j Belongs to {1, 2, 3, 4}, i not equal to j
i and j are selected randomly.
Best Regards

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采纳的回答

Youssef Khmou
Youssef Khmou 2013-3-15
or you can try :
a=1:4;
v=perms(a); % ALL possible combinations
Z=[v(:,1:2);v(:,3:4)];% Z is 2 columns
  2 个评论
abdulhakeem
abdulhakeem 2013-3-15
Dear Youssef KHMOU,
Thank you very much that is exactly I want. I appreciate That.
Best Regards

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更多回答（2 个）

Youssef Khmou
Youssef Khmou 2013-3-15
编辑：Youssef Khmou 2013-3-15
hi,
Random sequence derived from which distribution ?
Z=rand(4); % from Uniform distribution.
Z=randn(4); % from Normal distribution.
Z=random('rayl',(1:4)'*(1:4)) % from Rayleigh distribution
Cedric
Cedric 2013-3-15
编辑：Cedric 2013-3-15
A basic approach, but dangerous as you don't know how much time it will take, could be..
ii = randi(4, 4, 1) ;
jj = randi(4, 4, 1) ;
while any(jj == ii)
jj = randi(4, 4, 1) ;
end
Z = [ii, jj]
If you don't want repetitions within ii or jj, you can use RANDPERM.

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