Generate a cell array with index values from two separate vectors

I have two cell arrays

x = {99983, 885735, 8993, 63742, 37443, 38437, 67638}

y = {99983, 885735, 99983, 885735, 8993, 63742, 37443, 38437, 67638, 8993, 99983, 885735, 8993, 63742, 99983, 885735, 8993, 63742, 37443, 38437, 67638,37443, 38437, 67638, 63742, 37443, 38437, 67638}

I would like to obtain a new cell array, z, such that:

z = {[1 3 11], [2 4 12 16], [5 11 13 17], [6 14 18 25], [7 19 22 26], [8 19 22 26], [9 21 24 28]}

In other words, z contains the index locations of the x elements in y

Answer 1

[Ameer Hamza]

Try this

x = {99983, 885735, 8993, 63742, 37443, 38437, 67638};
y = {99983, 885735, 99983, 885735, 8993, 63742, 37443, 38437, 67638, 8993, 99983, 885735, 8993, 63742, 99983, 885735, 8993, 63742, 37443, 38437, 67638,37443, 38437, 67638, 63742, 37443, 38437, 67638};

[~, idx] = ismember([y{:}], [x{:}]);
z = splitapply(@(x) {x}, 1:numel(y), idx);

[Ronald]

Thank you very much. This does exactly what I wanted to achieve!

[Ameer Hamza]

I am glad to be of help!