How can I store arrays in container maps

Hi all, I am very new to matlab and I have some questions on container map. I would like to know how to store arrays under container map. I have the following simple code, but it cannot give me the array desired. How can I do that?

keySet = {'1,1', '1,2'}

keySet = 1×2 cell array
    {'1,1'}    {'1,2'}

valueSet = [[2 3], [3 4]];
M = containers.Map(keySet,valueSet)

Error using containers.Map
The number of keys and values must be the same.

M('1,1')

[Dyuman Joshi]

valueSet must have 2 elements, corresponding to keySet

%Using [] will result in joining all elements
valueSet = [[2 3], [3 4]]

valueSet = 1×4

2 3 3 4

keySet = {'1,1', '1,2'};
%use cell array
valueSet = {[2 3], [3 4]};
M = containers.Map(keySet,valueSet);
M('1,1')

ans = 1×2

2 3

[Tsz Tsun]

Thanks a lot! : )