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Results tagged with jacobian
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user 33269
Questions related to the calculation or use of the Jacobian matrix or its determinant. Not to be confused with the Jacobi iterative method for solving systems of linear equations. For those, use [iterative-method] instead.
3
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Accepted
Method of Lines: How to simplify Jacobian with periodic BCs?
If your advection problem had Dirichlet of Neumann boundary conditions, the linear system would be tridiagonal and you could apply the Thomas algorithm. With periodic boundary conditions, however, we …
- 1,124
4
votes
Specifying ode solver options to speed up compute time
('Jacobian', jacobian));
ttoc = toc(ttic);
fprintf('runtime %f seconds ... … If you insist on having JPattern, use
jacobian = advMat + diffMat;
jpattern = jacobian ~= 0; …
- 1,124
5
votes
Solving stiff ODEs: Dealing with Jacobian terms which take too long to compute with finite d...
In the extreme case of using the zero matrix as the Jacobian, Newton's method degenerates into a fixed point iteration. … Conclusion
Probably the easiest think to do is try CVODE with the partial Jacobian because your code is already set up for this. …
- 1,124