the inversion of large impedance matrix in MOM
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Hi all
I try to analyse a structure using method of moment which produces large dense squared impedance matrix. when I try to solve the matrix equation A*X=B, the inversion procedure takes more than 4GB RAMs.Is there any idea to solve this matrix equation in reasonable time with less RAMs?
6 commentaires
Steven Lord
le 14 Sep 2015
How large is your "large dense" matrix?
Are you using a 32-bit or 64-bit version of MATLAB?
Can you easily compute A*x for a vector x without explicitly creating the matrix A? If so, use one of the iterative solvers like GMRES.
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Walter Roberson
le 14 Sep 2015
svd with 'econ' mode and see http://adrianboeing.blogspot.ca/2010/05/inverting-matrix-svd-singular-value.html
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Walter Roberson
le 14 Sep 2015
Then the answer to your original question is NO. Install more RAM if the current size is a problem.
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