Convert cell array of cell arrays to matrix of matrices

 I can convert a cell array of matrices to matrix: 

 

>> C={[1,1]; [2,2]; [3,3]};

>> cell2mat(C)

ans =

     1     1

     2     2

     3     3

This is OK. But, I want to convert a cell array including other cell arrays to a matrix: 

 

>> C={{1,1}; {2,2}; {3,3}};    

>> cell2mat(C)

Error using cell2mat (line 53)

Cannot support cell arrays containing cell arrays or objects.

So, desired output is: 

 

>> mycell2mat({{1,1}; {2,2}; {3,3}})

ans =

     1     1

     2     2

     3     3

How to do this?

Edit:

I want to do same thing for multidimensional ones also: 

 

>> mycell2mat({{1,1;1,1}; {2,2;2,2}; {3,3;3,3}})

ans(:,:,1) =

     1     1

     1     1

ans(:,:,2) =

     2     2

     2     2

ans(:,:,3) =

     3     3

     3     3 

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Answers: 
To be honest, I never liked cell2mat for being slow, so I've come up an alternative solution using comma-separated lists instead!
Transform a cell array of vectors 
This is fairly simple, just use the colon operator and concatenate all vectors vertically: 
 
C = {[1,1]; [2,2]; [3,3]}; 
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