MATLAB: How to make a dictionary of arrays

arraydictionarymappingMATLAB

I can't seem to figure out how containers.Map works… It's doing ok with characters and numbers, but flips out when I try to feed it arrays. How do I make something like this?
    function test
    global a
    a = containers.Map();
    a(pi) = 3:14;
    a(5) = 4:2:10;
    end

Best Answer

Solarmew - the default KeySet type for a container is char (see containers.Map for details) and so when you try the above, you probably see the following error message
 Error using containers.Map/subsasgn
 Specified key type does not match the type expected for this container.
The above error makes sense since your key of pi or 5 are of type double (or single). Since you want your keys to be doubles then just define the KeySet and _ValueType* properties as
 a = containers.Map('KeyType','double','ValueType','any');
which means that
 a = 
  Map with properties:
        Count: 0
      KeyType: double
    ValueType: any
And so you can now use pi or 5 as a key
 a(pi) = 3:14;
 a(5)  = 4:2:10;
Try the above and see what happens!
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