[ANN] DescriptorSystems.jl: A package for manipulation of generalized state-space (descriptor) system representations

See GitHub - baggepinnen/ControlSystemIdentification.jl: System Identification toolbox for LTI systems, compatible with ControlSystems.jl
In particular, to estimate transfer functions from experimental time-domain data, see the functions arx, armax, tfest and arxar.

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I actually already saw this package but thanks for the reminder. I was more thinking about frequency-domain data, but time-domain is useful too.

If you have frequency-domain data, see tfest

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