How to use blkdiag command to create a matrix such that its diagonal blocks are random 2 x 2 matrices?

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parag gupta 2019-3-18

评论： parag gupta 2019-3-18

for k = 1 : 4

A = rand(2,2)

end

By using the above command I got 4 random matrices.How to create a block diagonal matrix of the form

a 0 0 0

0 b 0 0

0 0 c 0

0 0 0 d

(Size of this matrix will be 8x8.)

such that a is the first random 2x2 matrix , b is the second random 2x2 matrix and so on.

how to use blkdiag command so that I can get a 8x8 r block diagonal matrix with 4 random matrices as their diagonal blocks.

Thanks

Matt J 2019-3-18

编辑：Matt J 2019-3-18

Acell=mat2cell(rand(8,2), ones(1,4)*2,2)
B=blkdiag(Acell{:})

Matt J 2019-3-18

You can use a loop to fill a cell array

for i=1:4
    Acell{i}=...
end

parag gupta 2019-3-18

thanks you!

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