Replacing elements of a matrix

Question

0 个投票

Hello, I have a 15*15 matrix of all zeros.I want to replace each element of the matrix with different 2*2 matrices. How can it be done?

Thanks

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Andrei Bobrov 2017-11-20

Do you want get a 30 x 30 matrix?

Santosh Nath 2017-11-20

yes. I think 30*30 matrix is the only possible option in this case

Answer 1

Walter Roberson 2017-11-20

0 个投票

That cannot be done. Numeric matrices must have scalars at each position.

It would be possible to convert the numeric matrix to a cell array and then replace the cell contents. num2cell() would do the conversion to cell.

Santosh Nath 2017-11-20

Thanks fore the ans. I shall try your suggestion.

Walter Roberson 2017-11-20

newMatrix = kron(YourMatrix, [1 1;1 1]);
newMatrix(I*2-1:I*2, J*2-1:J*2) = TwoByTwoMatrixFor(I,J)

Answer 2

Andrei Bobrov 2017-11-20

0 个投票

InitData = randi(150,2,2,15,15);
out = reshape(permute(InitData,[1 3 2 4]),30,[]);

or

InitData = arrayfun(@(x)randi(150,2,2),ones(15),'un',0);
out = cell2mat(InitData);