HOW TO DIVIDE RANDOMLY

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

Answer 1

[Andrei Bobrov]

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

Answer 2

[Andreas Goser]

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

[Andreas Goser]

Looks like you are going to the same university:

http://www.mathworks.com/matlabcentral/answers/16045-how-to-sort-into-groups

[Pat]

can u tell how to do this,please

Create a set of random numbers with indices, e.g. (1,5), (2,3) etc.

[Pat]

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