optimize my matrix function

this is my code:

        t=1;
        for j=k_indices
            knn_labels(t,1) = classifier.Ytrain(j,1);
            t = t+1;
        end

what I'm doing here is using a vector of indices to create a vector of the values at those indices using some other matrix:

example:

But, I am sure that there is some pretty one liner that does this. Any one knows what that line looks like?

Thank you

Answer 1

[Walter Roberson]

knn_labels = reshape( classifier.YTrain(k_indices), [], 1);

[danielle sisserman]

perfect! thank you Walter :)