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

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

Answer 1

[Matt J]

Acell=mat2cell(rand(8,2), ones(1,4)*2,2)

B=blkdiag(Acell{:})

[parag gupta]

Hey,

thank you so much.

Can u please tell how to write this in a for loop .. i mean how to create a NxN block diagonal matrix and with its blocks of size mxm where m<N.

[Matt J]

You can use a loop to fill a cell array

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

[parag gupta]

thanks you!