Selecting a Randomly Matrix as Part of a Block Diagonal Matrix

1 view (last 30 days)
Hello,
I have 2 matrix which are name temp and temp2 And I want to create a block diagonal Matrix with temp and temp2. However I want to select blocks randomly
Here is my code but I cannot run it. Is there any possibility for choosing a matrix randomly as an element of other matrix
function A = new(d)
A=zeros(d,d,2,d);
projectors_of_sigma_x = [1/sqrt(2)*[1;1],1/sqrt(2)*[1;-1]];
temp = projectors_of_sigma_x(:,1)*transpose(projectors_of_sigma_x(:,1));
temp2 = projectors_of_sigma_x(:,2)*transpose(projectors_of_sigma_x(:,2));
for k=1:d
A(:,:,1,k) = repmat(blkdiag(randi(temp,temp2),randi(temp,temp2)),1,1);
end
end

Accepted Answer

Jemima Pulipati
Jemima Pulipati on 6 Jul 2020
Hello,
From my understanding you are trying to use randi(temp, temp2) to randomly select between two matrices temp and temp2 but randi(imax, n) returns an n-by-n matrix of pseudorandom integers drawn from the discrete uniform distribution on the interval [1, imax]. So it is throwing an error when used with blkdiag().
You may use randperm() to generate the random permutation of positions.
You can store the temporary matrices in a cell array and then generate a random positions of matrices using randperm() and pass it on to blkdiag.
An example:
B = {temp, temp2}
order1 = randperm(2,1)
order2 = randperm(2,1)
blkdiag(B{order1}, B{order2})
order1, order2 indicate positions of matrices in B that can be passed to blkdiag()

More Answers (0)

Categories

Find more on Creating and Concatenating Matrices in Help Center and File Exchange

Products


Release

R2020a

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!