Known Bugs

[mfalt]

We can use this issue to keep track of known bugs, issues and the progress we are making after pulling the major autodiff branch

Bugs

• [x] pole for mimo system, should not return duplicates, see https://github.com/JuliaControl/ControlSystems.jl/issues/81 (PR merged #165 )
• [ ] dampreport fails on complex poles
• [ ] minreal will throw error for Integer systems if poles are not exact integers see https://github.com/JuliaControl/ControlSystems.jl/issues/127
• [ ] feedback2dof silently breaks for discrete systems see https://github.com/JuliaControl/ControlSystems.jl/issues/95
• [ ] call on discrete system with freq vector ignores "map_to_unit_circle" Fixed:
• [ ] Systems can have negative sample time (used for "unspecified sample time"), makes iscontinuous true, results in bugs in evalfr

Type problems

• [ ] c2d of TransferFunction{SisoZpk} returns ``TransferFunction{SisoRational}`

Other issues

• [x] Tests for plots are deactivated for now
• [ ] c2d not working for improper transfer functions, see https://github.com/JuliaControl/ControlSystems.jl/issues/128
• [ ] Multiple "TODO" in code needs to be be checked