How to generate a no. of permutations(lets say 100) of a particular row of a matrix(consisting of 30 coloumns) and store the generated permutation into another array row wise??

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UTKARSH SINGH
UTKARSH SINGH 2015-4-4
评论： Image Analyst 2016-3-3
Basically I am trying to generate population for my chromosome in genetic algorithm. I have made an array of 30 elements and now to generate the population, I have to permutate the elements of the array and store these permutations in form of a matrix row wise.Now can I do this using permute and other permutation functions in matlab or will I have to make a different method to generate this.Any reference codes shall be very helpful.

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Roger Stafford
Roger Stafford 2015-4-4
If r is the 30-element row vector being used, do this:
m = 100;
n = 30;
[~,p] = sort(rand(m,n),2);
s = reshape(r(p),m,n);
The rows of matrix s will each be a random permutation of r.
  2 个评论
Image Analyst
Image Analyst 2016-3-3
Yes
m = [90 90 -45 0 0 45 45 0 -45 15 30 -30 75 -45 75 -75 45 45 0 -45 15 30 ];
newSortingOrder = randperm(length(m));
mScrambled = m(newSortingOrder);
Just call that code 500 times to get 500 different permutations.

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更多回答（1 个）

Image Analyst
Image Analyst 2015-4-4
编辑：Image Analyst 2015-4-4
Try randperm() or randi().
newSortingOrder = randperm(30);

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