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NetworkDynamics Release Notes

v0.9 Changelog

Main changes in this release

NetworkDynamics v0.9 is a complete overhaul of the previous releases of NetworkDynamics. Users of the package should probably read the new documentation carefully.

The most important changes are:

  • Explicit split in f and g function: There is no split into ODE and Static components anymore, everything is unified in component models with internal function f and output function g.
  • Parameters handling: Parameters are allways stored in a flat array. The Symbolic Indexing Interfaces helps to set and retrieve parameters.
  • Automatic aggregation: vertices no longer receive a list of all connected edges. This lead to inhomogeneous call signatures and was a performance bottleneck. Now, each Network has a aggregation function attached to it. The backaned will perform a reduction over all connected edges to calculate the input for a certain vertex. In practice, for typical flow networks you'll allways receive the sum of all flows rather than the individual flows.
  • Symbolic Indexing: the order of the states in the state vector changed in non-trivial ways. But the old idx_containing and syms_containing functions have been replaced with a much more capable symbolic indexing framework.

Limitations

  • We dropped support for delay differential equations. If you've been using that feature please reach out to us.
  • Due to the built aggregation, the vertices cannot explicitly handle the inputs from edges differently anymore. If you've been relying on those features reach out to us.