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Generating row combination from a set of data

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hithere on 11 Jan 2015
Closed: MATLAB Answer Bot on 20 Aug 2021
Lets say i have 37 filters and their transmittance in a (37 x 25) matrix
In this set of 37 filters i like to randomly pick 3 filters out everytime, no repetition. So it's like 37 choose 3, there should be a total of 7770 combinations.
Can I form a 3D matrix using a for loop for this? where it should be (3 x 25 x 7770)
Where 3 is the set of filters for each combinations 25 is the data points as per original and 7770 is the total combinations

Answers (1)

Shoaibur Rahman
Shoaibur Rahman on 11 Jan 2015
Edited: Shoaibur Rahman on 11 Jan 2015
T = rand(37,25);
fil = 1:37;
b = combntns(fil,3);
for k = 1:size(b,1)
out(:,:,k) = T(b(k,:),:);

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