4. Systems

AutoReduce represents models with system.system.System. A system stores symbolic states, symbolic dynamics, parameters, initial conditions, and either a linear output matrix or a nonlinear output function.

4.1. Core System

Use System when model equations are already available as SymPy expressions.

from sympy import Symbol

from autoreduce import System

x = Symbol("x")
k = Symbol("k")
system = System([x], [-k * x], params=[k], params_values=[1.0], x_init=[2.0])

4.2. python-control Adapter

The python-control adapter is implemented in autoreduce.system.control and requires the control extra.

pip install "autoreduce[control]"

The adapter converts a control.NonlinearIOSystem into an AutoReduce System by evaluating the python-control update and output functions with symbolic states, inputs, and parameters.