Solving ODE with conditional statements
1 view (last 30 days)
Show older comments
Hi,
I have a question here regarding ODE modeling in matlab. I was wondering if I can create an ODE model with conditional statements.
For example: dx/dt = 1/7 dy/dt = 1/3 dy/dt = 0 if x & y are both integers
If it is possible, what would be the command/coding script for dy/dt in this case?
Thanks!
0 Comments
Answers (2)
Jan
on 25 Aug 2013
Edited: Jan
on 25 Aug 2013
An integration requires a smooth function. For such discontinuities the stepsize controller of Matlab's integrators get serious troubles, see e.g. http://www.mathworks.com/matlabcentral/answers/59582#answer_72047 .
The integrator controls the stepsize based on the locale discretization error. Therefore it is very unlikely, that the variables are exactly integer. Then notice, that x and y will have integer values for an infinitely interval only. Therefore changing the derivative there, this cannot change the result of the integration.
0 Comments
See Also
Categories
Find more on Get Started with Optimization Toolbox 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!