How to generate k unique random numbers from 1 to n in matlab 2009
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Hi, I knew randperm(n,k) works but this is after 2011. Can some one tell me if there is any efficient way to do it in matlab 2009.
Thanks
采纳的回答
Azzi Abdelmalek
2013-4-27
[idx,idx]=sort(rand(1,n));
out=idx(1:k)
1 个评论
Jan
2013-4-27
The result is biased, because Matlab's sort is stable. The effects are very tiny and they appear in Matlab's randperm function with 1 input argument also.
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Jan
2013-4-27
0 个投票
Not biased and faster than sorting a RAND vector: http://www.mathworks.com/matlabcentral/fileexchange/27076-shuffle
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