Randperm generating the same sequence of permutation

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Saikath Bhattacharya
评论： Saikath Bhattacharya 2015-6-17
I am using randperm to generate different random permutations (subset of the data) from a data set. However even after 2 iterations it is generating the same combination of the number. For eg: the desired output would be like p={1,3,5,6,9,10},{4,6,7,2,1,3}... however i am getting p={1,4,5,7,8},{1,4,5,7,8}. its the same sequence i am getting.
saikath

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回答（2 个）

Azzi Abdelmalek
Azzi Abdelmalek 2015-6-17
编辑：Azzi Abdelmalek 2015-6-17
for k=1:3
out{k}=randperm(10,5)
end
celldisp(out)
James Tursa
James Tursa 2015-6-17
Are you resetting the random number generator in between iterations?
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Guillaume
Guillaume 2015-6-17
You can use two different RandStream, one for the random sequence generation, one for randperm.
Saikath Bhattacharya
Saikath Bhattacharya 2015-6-17
Thanks a lot. i figured it a different approach, i generated 100 random subjects. and selecting random subject at a time and kept it in an iteration.
Thanks a lot

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