[python-control-developers] [python-control/python-control] 2915ba: Update evalfr usage for consistency with MATLAB

[Richard M. <mu...@cd...>]

  Branch: refs/heads/master
  Home:   https://github.com/python-control/python-control
  Commit: 2915bafa80c2e4e49259e1b7c61b26bb0150b3fe
      https://github.com/python-control/python-control/commit/2915bafa80c2e4e49259e1b7c61b26bb0150b3fe
  Author: Richard Murray <mu...@cd...>
  Date:   2018-01-06 (Sat, 06 Jan 2018)

  Changed paths:
    M control/frdata.py
    M control/margins.py
    M control/statesp.py
    M control/tests/statesp_test.py
    M control/tests/xferfcn_test.py
    M control/xferfcn.py

  Log Message:
  -----------
  Update evalfr usage for consistency with MATLAB

Renamed evalfr() in the FRD, StateSpace and TransferFunction classes to
_evalfr() and put a deprecation warning for use of the evalfr() method.

Changed calls to evalfr() in frdata.py and margins.py to use _evalfr()

Added unit tests for the the new methods + warnings

These changes eliminate the inconsistency in the argument form between the
(MATLAB compatible) evalfr() function, which takes a complex argument, and
the evalfr() methods for LTI objects, which took a real number as argument
(representing the frequency).  The _evalfr() method retains the original
functionality, since it is used for computing stability margins and for
converting objects to FRD form.


  Commit: bb65f314e6429d9fe03aea989afe74fc7a6942a0
      https://github.com/python-control/python-control/commit/bb65f314e6429d9fe03aea989afe74fc7a6942a0
  Author: Richard Murray <mu...@cd...>
  Date:   2018-01-12 (Fri, 12 Jan 2018)

  Changed paths:
    M control/frdata.py
    M control/margins.py
    M control/statesp.py
    M control/tests/statesp_test.py
    M control/tests/xferfcn_test.py
    M control/xferfcn.py

  Log Message:
  -----------
  Merge pull request #179 from murrayrm/update_evalfr

Update evalfr() to be consistent with MATLAB usage


Compare: https://github.com/python-control/python-control/compare/7795a13cac1c...bb65f314e642