Formulating an ODE system

[n-mourdou]

Hey everyone,

I have a question regarding the definition of an ODE.

I have a quite big vector as a (time) dependent variable, so it is difficult to define explicitly its rhs part by hand.

Is there a way to define a big vector variable and then access certain slices or coordinates of it and define their time derivative?

Thank you

[valentinsulzer]

You can maybe use e.g. StateVector(slice(10:20)) to do what you are describing. But I don't really understand why you are trying to do it like this. Can you post the full model in mathematical notation?