How to create big matrix that the item is small matrix
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I wish to create a 252*252 matrix with 21 row and column
every item have 12*12 matrix.
So 12*12 until 21 column and row =matrix 252*252
the main diagnonal is matrix D (12*12), upper diagonal is matrix T (12*12), and the last main diagonal is matrix F.
Manually, it looks like this
%12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12
D T 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 D T 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
...
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 F
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