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MATLAB hang while inverting a matrix

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ash
ash 2015-6-28
评论： Walter Roberson 2015-6-29
why MATLAB hang while inverting that matrix, I left it more than a day willing to get any result, but nothing happened
K_total\[0;0;0;0;0;0;0;0;0;0;1;0;0;0;0;0;0;0;0;0;0];
Thanks

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回答（2 个）

ash
ash 2015-6-29
Kindly find the attached file containing K_total, It was attached with my question
Walter Roberson
Walter Roberson 2015-6-29
Your K_total is symbolic so you are asking for a symbolic solution rather than a numeric solution.
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John D'Errico
John D'Errico 2015-6-29
You may think that a symbolic result with only 21 unknowns cannot be too big, but it will be IMMENSE.
Walter Roberson
Walter Roberson 2015-6-29
I cannot read the .mat file as I do not have the symbolic toolbox, so I do not know how complex it is.
But remember that even just the exact solutions of a quartic is very big.

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