find the position (number) where the condition was met

[~,Y5] = kmeans(X,5,'Distance','cityblock',...
    'Replicates',5,'Options',opts);

Hello! I have such a code, it gives me all the necessary values, to the edge of one, of the place (position number) where he took them, is it possible to find out how these numbers (position coordinates) are. For example, [~, Y4] = min (X1) I know Y4 for sure (I need the coordinates)