MATLAB: Initializing a cell array in matlab

cell arrayinitializationpreallocation

I have a cell array like this
   Columns 1 through 7
      [0x1 double]    [2x1 double]    [2x1 double]    [0x1 double]    [2x1 double]    [2x1 double]    [2x1 double]
    Columns 8 through 12
      [2x1 double]    [4x1 double]    [3x1 double]    [3x1 double]    [4x1 double]
is there a way to initialize them since i don't know the size of the element (0x1double)? The only thing i know is that i have 12 elements but not the actual inner size.

Best Answer

You pre-allocate only the cell:
C = cell(1, 12);
There is no need to pre-allocate the elements of the array, because you can pre-allocate the arrays, when you create them. When you assign them to the cell element, the former contents is overwritten. Therefore pre-defining the cell elements is not a pre-allocation, but a waste of memory.
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