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Title: Additional I/O system type conversions by murrayrm · Pull Request #672 · python-control/python-control · GitHub

Open Graph Title: Additional I/O system type conversions by murrayrm · Pull Request #672 · python-control/python-control

X Title: Additional I/O system type conversions by murrayrm · Pull Request #672 · python-control/python-control

Description: This PR adds some type conversations for algebraic operations involving I/O systems, motivated by an example I was putting together where I wanted to generate a Nyquist plot for a linearized nonlinear I/O system (type LinearIOSystem) and a simple lead compensator (type TransferFunction). Using P * C generated a type conversation error but C * P was OK as was ct.tf(P) * C. It seemed annoying to have to do the explicit typecasting, so I decided to implement some of the operations that were needed to make P * C work (generates a LinearICSystem, which is a subclass of StateSpace). The following functionality has been added: Added __sub__, so that you can write G1 - G2 for I/O systems Added conversions for scalars, arrays, state space, and transfer function systems so that they can be combined with I/O systems on either the left or right. Set the Numpy __array_priority__ value so that operations involving ndarrays are handled as I/O system operations and I/O system operations take precedence over LTI operations involving ndarrays. I also did some PEP8 cleanup on iosys.py while I was at it, and put in unit tests for the code.

Open Graph Description: This PR adds some type conversations for algebraic operations involving I/O systems, motivated by an example I was putting together where I wanted to generate a Nyquist plot for a linearized nonlin...

X Description: This PR adds some type conversations for algebraic operations involving I/O systems, motivated by an example I was putting together where I wanted to generate a Nyquist plot for a linearized nonlin...

Opengraph URL: https://github.com/python-control/python-control/pull/672

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4023edd add iosys conversions (mul, rmul, add, radd, sub, rsub) + PEP8 cleanup murrayrm Nov 21, 2021 https://github.com/python-control/python-control/pull/672/commits/4023edd8b1aa77c70af48dd68345e3accd0d347e
8912b77 update tests to avoid NumPy matrix deprecation murrayrm Nov 21, 2021 https://github.com/python-control/python-control/pull/672/commits/8912b7714a0e8de2bb68a2d52bffc8d273b8eebd
be9e7ea add a few more unit tests for coverage murrayrm Nov 21, 2021 https://github.com/python-control/python-control/pull/672/commits/be9e7eabf86b3efa025a0e6854a276cf32782b35
93c3f5c respond to review comments from @bnavigator murrayrm Nov 26, 2021 https://github.com/python-control/python-control/pull/672/commits/93c3f5c7ed00c047936936a692627b7224f91909
a44d1a4 TRV: fix docstring typo murrayrm Nov 26, 2021 https://github.com/python-control/python-control/pull/672/commits/a44d1a42ff7c7b4ad5510a06ffda785156f30699
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