repeat a matrix as digonal element in a new matrix?
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smabtahi
on 30 May 2012
Commented: Muhammad Fiaz
on 24 Jan 2022
Hi
I have a 2D matrix, and I want repeat it a digonal element in a new matrix., somthing like this:
A is 2*3 matrix , and we want reapeat for 10 time like:
B= [ A 0 0 .....0; 0 A 0 .....0; .............. ;0 0 0 ........A]
hence B is a 20*30 matrix. How can make B without using "for"?
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Accepted Answer
Titus Edelhofer
on 30 May 2012
Hi,
I usually use blkdiag:
A = rand(2,3);
ACell = repmat({A}, 1, 10);
BigA = blkdiag(ACell{:});
Titus
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