Sparse knonecker product of large and several matrices

19 visualizaciones (últimos 30 días)
Fernando
Fernando el 26 de Mzo. de 2014
Comentada: Fernando el 26 de Mzo. de 2014
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,

Respuesta aceptada

Matt J
Matt J el 26 de Mzo. de 2014
Editada: Matt J el 26 de Mzo. de 2014
E=speye(100);
I=ones(20);
K=kron(E,I);
  3 comentarios
Fernando
Fernando el 26 de Mzo. de 2014
Thanks, I'll look at this.

Iniciar sesión para comentar.

Más respuestas (0)

Categorías

Más información sobre Sparse Matrices en Help Center y File Exchange.

Etiquetas

Community Treasure Hunt

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

Start Hunting!

Translated by