MATLAB: How to find inverse of a 608*608 matrix fast

inverse of matrixlinear algebra

I am trying to find the inverse of Q00{5} in the attached c=2_g=1_l=5.mat file. I have tried inv() function as well as backslash function. But this inverse is taking so much time like 20-30 minutes. Is there any faster method to calculate the inverse of this size matrix?

Best Answer

The matrices in this file are symbolic, it's very expensive to compute with large arrays of these variables. If you cast it to floating-point numbers, this will be much faster to compute with
>> A = double(Q00{5});
>> tic; inv(A); toc
Elapsed time is 0.009040 seconds.
Related Question