[python-control-announce] python-control 0.9.1 now available

[Murray, R. M. <mu...@cd...>]

Version 0.9.1 is a minor release that includes new functionality for discrete time systems (dlqr, dlqe, drss), flat systems (optimization and constraints), a new time response data class, and many individual improvements and bug fixes.

Installation instructions:

 pip install slycot     # optional
 pip install control

You should get slycot-0.4.0.0 and python-control-0.9.1.  Note that python-control depends on numpy, scipy, and matplotlib and you will need recent versions of all of these packages in order to run v0.9.1.

Binary installations are available for Linux, Mac, and Windows platforms using conda and conda-forge:

 conda install -c conda-forge control

Slycot should be installed automatically, without the need for a Fortran compiler.

Documentation is available at https://python-control.readthedocs.org/

A detailed list of changes is appended below.

-richard

New features:

* Add optimization to flat systems trajectory generation (#569 by murrayrm)
* Return a discrete time system with drss() (#589 by bnavigator)
* A first implementation of the singular value plot (#593 by forgi86)
* Include InfValue into settling min/max calculation for step_info (#600 by bnavigator)
* New time response data class (#649 by murrayrm)
* Check for unused subsystem signals in InterconnectedSystem (#652 by roryyorke)
* New PID design function built on sisotool (#662 by sawyerbfuller)
* Modify discrete-time contour for Nyquist plots to indent around poles (#668 by sawyerbfuller)
* Additional I/O system type conversions (#672 by murrayrm)
* Remove Python 2.7 support and leverage @ operator (#679 by bnavigator)
* Discrete time LQR and LQE (#670 by sawyerbfuller, murrayrm)

Improvements, bug fixes:

* Change step_info undershoot percentage calculation (#590 by juanodecc)
* IPython LaTeX output only generated for small systems (#607 by roryyorke)
* Fix warnings generated by sisotool (#608 by roryyorke)
* Discrete time LaTeX repr of StateSpace systems (#609 by bnavigator)
* Updated rlocus.py to remove warning by sisotool() with rlocus_grid=True (#616 by nirjhar-das)
* Refine automatic contour determination in Nyquist plot (#620 by bnavigator)
* Fix damp method for discrete time systems with a negative real-valued pole (#647 by vincentchoqueuse)
* Plot Nyquist frequency correctly in Bode plot in Hz (#651 by murrayrm)
* Return frequency response for 0 and 1-state systems directly (#663 by bnavigator)
* Fixed prewarp not working in c2d and sample_system, margin docstring improvements (#669 by sawyerbfuller)
* Improved lqe calling functionality (#673 by murrayrm)
* Vectorize FRD feedback function (#680 by bnavigator)
* BUG: extrapolation in ufun throwing errors (#682 by miroslavfikar)
* Allow use of SciPy for LQR, LQE (#683 by murrayrm)
* Improve forced_response and its documentation (#588 by bnavigator)
* Add documentation about use of axis('equal') in pzmap, rlocus (#685 by murrayrm)

Additional changes:

* Replace Travis badge with GHA workflows, add PyPI and conda badges (#584 by bnavigator)
* Don't install toplevel benchmarks package (#585 by bnavigator)
* LTI squeeze: ndarray.ndim == 0 is also a scalar (#595 by bnavigator)
* xfail testmarkovResults until #588 is merged (#601 by bnavigator)
* Remove from readme.rst that you need a fortran compiler (#602 by sawyerbfuller)
* Remove statement that slycot only on linux (#603 by sawyerbfuller)
* Allow float precision in result assertions (#615 by bnavigator)
* Improved unit test coverage for root_locus: dtime and sisotool (#617 by bnavigator)
* Add DefaultDict for deprecation handling (#619 by bnavigator)
* Documentation updates (#633 by murrayrm)
* Various docstring edits + fixed plot legends on cruise control example (#643 by billtubbs)
* Ease test tolerance on timeseries (#659 by bnavigator)
* Use conda-forge for numpy (CI fix) (#667 by bnavigator)
* Fix doc escape (#674 by bnavigator)
* Remove duplicate Slycot error handling, require Slycot >=0.4 (#678 by bnavigator)

Full list of merged PRs: https://github.com/python-control/python-control/pulls?utf8=%E2%9C%93&q=is%3Amerged+milestone%3A0.9.1