Implement function that returns the output of the dynamic rule of the system

[YiboXia94]

I notice that in the latest version of dynamicalsystems.jl ds becomes the integrator itself. It's a good improvement but I don't know how to get the derivative via get_du() now. Could we have the same function?

[Datseris]

What does derivative mean here? I guess you have a continuous time system and you want the output of the dynamic rule.

Then you do f = dynamic_rule(ds) to get the derivative function and depending on whether it is in place or out of place you can do current_state(ds) appropriately to get the derivative.

[Datseris]

but I guess a convenience function dynamic_rule_output(ds) would work as well if you wanna contribute it!

[YiboXia94]

What does derivative mean here?

derivative I mean here is the real-time derivative value, function get_du can be found in https://docs.sciml.ai/DiffEqDocs/dev/basics/integrator/#SciMLBase.get_du.

but I guess a convenience function dynamic_rule_output(ds) would work as well if you wanna contribute it!

Yes, I would write one just like get_du() in DifferentialEquations.jl

[YiboXia94]

hello Datseris!

functions have been added, please see request #172.

Have a nice day!

[Datseris]

Thanks, but you don't have to write that you've opened a PR, I can see the PR immediatelly in the notifications ;)

[Datseris]

The solution here is to implement the generic function dynamic_rule_output(ds, u, p, t) that works for any dynamical system and returns the output of the dynamic rule.