LINEAR2D#
The main testing model is macrostat.models.LINEAR2D.LINEAR2D, a 2D
linear system with dynamics
\[x_{t+1} = A x_t,\]
where \(x_t\) is a 2D state vector and \(A\) is a fully parameterised
2x2 matrix. This model has an analytical Jacobian, so it is used in the
tests/diff/diff_test.py unit tests and in the
offline/macrostat_testing/calib_example.py script to validate the
implementation of macrostat.diff.