error to get the answer by Kronecker

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Mariam Gasra 2019-5-1

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https://ww2.mathworks.cn/matlabcentral/answers/459537-error-to-get-the-answer-by-kronecker

评论： imrankhan ajees 2019-5-1

function K = kronecker(A,B)
if ~issparse(A) && ~issparse(B)
    if ~ismatrix(A) || ~ismatrix(B)
        error('kronecker:TwoDInput','Inputs must be 2-D.');
    end
    % Both inputs are full, result is full. This is faster than
    % MATLAB stock kron (indexing based)
    [ma, na] = size(A);
    [mb, nb] = size(B);
    A = reshape(A,[1 ma 1 na]);
    B = reshape(B,[mb 1 nb 1]);
    K = bsxfun(@times,A,B);
    K = reshape(K,[ma*mb na*nb]);
    
else % One of the input matrix is sparse
    
    % Call MATLAB stock KRON
    K = kron(A,B);
    
end