Spectral DCM with external input and more robust measurements #345
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…machinery to deal with it in blox_utilities.jl: function get_states_without_drive
… external input. Implementation differs from SPM12 since C parameter is not being overwritten when transfer function is being computed but the user-set value is kept.
…w.r.t. potential changes in MTK and pecularities about model assembly. It also deprecates the get_hemodynamic_observers function.
…al) based on Haris's comment to use irreducible to maintain measurement equations which are algebraic equations of dynamic variables. This makes in particular transferfunction_fmri much more elegant and robust.
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Using the irreducible flag as Haris had suggested some time ago, I could make the code much more robust w.r.t. pecularities of model assembly (makes the code more robust for use with GUI) or potential MTK changes.
In addition the option to add external input in LinearNeuralMass is now also implemented. Note that for some unclear reason SPM12 adds the external input parameter even if no external input is provided - here we reproduced that behavior.