How to make solve stop when a non-trivial solution is first found
2 views (last 30 days)
Show older comments
Tommi Muller
on 1 Jun 2020
Answered: Abhisek Pradhan
on 5 Jun 2020
I have a system of quadratic equations I would like to solve, something like below:
syms q11 q12 q13 q21 q22 q23 q31 q32 q33
[q11_sol, q12_sol, q13_sol, q21_sol, q22_sol, q23_sol, q31_sol, q32_sol, q33_sol] = ...
solve(...
q11*q22 == q12*q21*((T(1,1)*T(2,2))/(T(2,1)*T(1,2))), ...
q22*q33 == q23*q32*((T(2,2)*T(3,3))/(T(3,2)*T(2,3))), ...
q11*q33 == q13*q31*((T(1,1)*T(3,3))/(T(3,1)*T(1,3))), ...
q31^2 + q32^2 + q33^2 == 1, ...
q21^2 + q22^2 + q23^2 == 1, ...
q11^2 + q12^2 + q13^2 == 1, ...
q21*q31 + q22*q32 + q23*q33 == 0, ...
q11*q31 + q12*q32 + q13*q33 == 0, ...
q11*q21 + q12*q22 + q13*q23 == 0);
where T is some matrix I defined.
My issue is that solving this system takes a long time, and I just want one non-trivial solution (just one solution that doesn't have 0's or 1's or -1's in it).
Is there a way for me to tell the solve function to stop when a non-trivial solution is first found?
2 Comments
Accepted Answer
Abhisek Pradhan
on 5 Jun 2020
solve by default returns one of the many solutions. Now the problem lies in getting a solution which is not trivial. the following, link may help in working with full solution.
0 Comments
More Answers (0)
See Also
Categories
Find more on Stress and Strain in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!