v0.7.0

GraphDynamics v0.7.0

Diff since v0.6.0

New features

• A PolyesterScheduler() scheduling object has been added which allows for parallelizing solves using Polyester.jl. This option helps performance during ODE solves where GC time dominates if multithreaded.
• If any subsystem in a problem has a parameter named dtmax, then the smallest dtmax parameter in the system is forwarded as a keyword argument to ODEProblem and SDEProblems to limit the maximum stepsizes allowed by the solver.
• If a connection type overrides GraphDynamics.connection_needs_ctx to give true, then connections of that type will be given a fourth ctx argument which gives it access to the full list of states_partitioned, params_partitioned, and connection_matrices when accumulating inputs.
• GraphDynamics integrates with Latexify.jl to latexify the equations of a GraphSystem.

Breaking changes

• PartitionedGraphSystem has been removed; GraphSystems holds a field g.flat_graph field with a PartitioningGraphSystem object which actively flattens and partitions the graph during solving
• apply_discrete_event!, apply_continuous_event!, and ForeachConnectedSubsystem have had their vstates and vparams arguments combined into a sys_view argument, which gives a view into the affected system for (and the connection form gets a sys_view_src and sys_view_dst). This sys_view can have it's fields be updated in place like so:

function GraphDynamics.apply_discrete_event!(integrator, sys_view, sys::Subsystem{MyType}, _)
    sys_view.x[] = sys.y
end

This will modify the x state or parameter of the system when the event triggers.

• apply_subsystem_noise!'s first argument is now modified in the same way as the view arguments of apply_discrete_event!. One would now write e.g.

function GraphDynamics.apply_subsystem_noise!(vstate, sys::Subsystem{BrownianParticle}, t)
    # No noise in position, so we don't modify vstate[:x]
    vstate.v[] = sys.σ    # White noise in velocity with amplitude σ
end

rather than vstate[:v] = sys.σ

Merged pull requests:

• Updates for v0.7.0 (#46) (@MasonProtter)

v0.1.4

GraphDynamics v0.1.4

This release has been identified as a backport.
Automated changelogs for backports tend to be wildly incorrect.
Therefore, the list of issues and pull requests is hidden.

v0.1.3

GraphDynamics v0.1.3

This release has been identified as a backport.
Automated changelogs for backports tend to be wildly incorrect.
Therefore, the list of issues and pull requests is hidden.

v0.1.2

GraphDynamics v0.1.2

This release has been identified as a backport.
Automated changelogs for backports tend to be wildly incorrect.
Therefore, the list of issues and pull requests is hidden.

v0.1.1

GraphDynamics v0.1.1

This release has been identified as a backport.
Automated changelogs for backports tend to be wildly incorrect.
Therefore, the list of issues and pull requests is hidden.

v0.1.0

GraphDynamics v0.1.0

This release has been identified as a backport.
Automated changelogs for backports tend to be wildly incorrect.
Therefore, the list of issues and pull requests is hidden.

v0.6.0

GraphDynamics v0.6.0

Diff since v0.5.0

Breaking changes

Switched computed_properties and computed_properties_with_inputs to take a type tag instead of subsystem argument. Now, instead of adding methods like

function GraphDynamics.computed_properties_with_inputs(::Subsystem{Particle})
    a(sys, input) = input.F / sys.m 
    (; a)
end

users should do

function GraphDynamics.computed_properties_with_inputs(::Type{Particle})
    a(sys, input) = input.F / sys.m 
    (; a)
end

Merged pull requests:

• Breaking: Switch computed_properties[_with_inputs] to take a type instead of subsystem argument (#45) (@MasonProtter)

v0.5.0

GraphDynamics v0.5.0

Diff since v0.4.9

Breaking changes

• Removed the fallback (cr::ConnectionRule)(src, dst, t) = cr(src, dst) which was added previously to avoid breakage when we made connection rules take a time argument in addition to the src and dst subsystems. The presence of this method was a bit of a annoying crutch
• Changed the arguments of discrete_event_condition from just (conn, t) to (conn, t, sys_src, sys_dst) so that events can trigger based off information in the source or destination subsystems as well
• Changed the arguments of has_discrete_events from just (typeof(conn),) for connection events to (typeof(conn), get_tag(src), get_tag(dst)), i.e. it now also can depend on the types of the source and dest subsystems
• Changed the arguments of event_times from just (conn,) to (conn, sys_src, sys_dst) for connection events.

Merged pull requests:

• Remove (::ConnectionRule)(src, dst, t) fallback method; make discrete_event_condition on connections take src / dst args. (#44) (@MasonProtter)

v0.4.9

GraphDynamics v0.4.9

Diff since v0.4.8

Merged pull requests:

• bump MTK combat (#43) (@vyudu)

v0.4.8

GraphDynamics v0.4.8

Diff since v0.4.7

Merged pull requests:

• allow symbolic indexing of vectors of observables (#41) (@vyudu)
• fix: change parameter_values(::GraphSystemParameters) to access params_partitioned (#42) (@vyudu)

Closed issues:

• Support vectors of Observed variables in the SymbolicIndexingInterface (#38)