Updated system class functionality by murrayrm · Pull Request #721 · python-control/python-control

added 15 commits

April 1, 2022 21:14
* LTI is NamedIOSystem instead of StateSpace, TransferFunction, and FRD
* implement _process_namedio_keywords and use for system/signal name, dt
* move timebase functions from lti to namedio
* move statesp/_ss code to iosys/ss and iosys/copy to namedio/copy
* clean up duplicate object/sysname warnings
* updated unit tests

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