Symbolic matrices multipleid incorrectly
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Hello!
I have matrix equation:
When I try to find X I get incorrect result:
Check does not pass:
I attach a .mat file with an example. There is a ST structure with M1 and M2 fields in a .mat file. Both are symbolic matrices.
Code for testing.
X = ST.M1^-1 * ST.M2;
disp(ST.M1 * X - ST.M2)
The invertible matrix of M1 is correct. The condition number of M1 is 1. Where is the problem?
回答（1 个）
What was your actual check that the result does not pass? Maybe you need to simplify() the result?
M1=sym('m1',[2 2]);
M2=sym('m2',[2 2]);
X=M1^-1*M2;
D = M1*X - M2 % looks non-zero
simplify(D) % is zero
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2021-5-8
2021-5-8
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