Sparse knonecker product of large and several matrices

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Fernando 2014-3-26

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评论： Fernando 2014-3-26

采纳的回答： Matt J

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Hi,

I'm trying to create a sparse kronecker product without actually generating the kron product and then generating the sparse matrix. Is there a way to do this? For example

E=eye(100);
I=ones(20);
K=sparse(kron(E,I));

Right now the code first generates the kron product and then keeps on the information of non-zero elements. As I need to do this lots of time because I need to generate and keep in memory different K matrices (K1, K2, ... K200, for E1,...E200, and I1,...I200), the generation of the kron product uses all my memory. Is there anyway I could go from the E's and I's to the K's without generating the full matrices?

Thanks,

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Matt J 2014-3-26

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https://ww2.mathworks.cn/matlabcentral/answers/123220-sparse-knonecker-product-of-large-and-several-matrices#answer_130614

编辑：Matt J 2014-3-26

在 MATLAB Online 中打开

   E=speye(100);
   I=ones(20);
   K=kron(E,I);

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Fernando 2014-3-26

Thanks!

Fernando 2014-3-26

Thanks, I'll look at this.

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