HOW TO DIVIDE RANDOMLY

Pat
2011 9 19
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a=[1 9 2 4 3 5 4 6 5 1 6 9 7 0 8 3 9 1 0 2 3 6 3 4 3 7 8 1 8 7 9 2 0 3 4 6 5 7 8 9 ] i want to divide this data into 5 groups RANDOMLY so taht the values in the column 1 and 2 should not change....... have to do this for large data also,can anyone help the output must be

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Andrei Bobrov
Andrei Bobrov 2011-9-19

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r = 5;
n = size(a,1);
k = n/r;
groups5 = reshape(permute(reshape(a(randperm(n),:),k,[],2),[1 3 2]),k,[]);

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Andreas Goser
Andreas Goser 2011-9-19

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  1. Move the data into the five groups as they are
  2. Create a set of random numbers with indices, e.g. (1,5), (2,3) etc.
  3. Flip the data using the random indices, e.g. flip data point group 1, element 5 with group 2, element 3
  4. Do this a reasonable amount of times

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Andreas Goser
Andreas Goser 2011-9-19
Looks like you are going to the same university:
http://www.mathworks.com/matlabcentral/answers/16045-how-to-sort-into-groups
Pat
Pat 2011-9-19
can u tell how to do this,please
Create a set of random numbers with indices, e.g. (1,5), (2,3) etc.
Pat
Pat 2011-9-19
I am working on ACCURATAE CANCER CLASSIFICATION FOR EXPRESSION OF VERY FEW GENES,T HAVE TO DO THIS PROCESS
use 2 or 3 genes from top 100 to generate a combination FCI,i have 4026 genes ,can anyone tell how to process PLZ

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