Known Bugs

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

• 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

• 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

Start by choosing one unchecked item in the Bugs, Type problems, or Other issues lists and follow any referenced issues, such as #127, #95, or #128. The work is done when that specific problem is resolved and its checklist entry can be updated; this issue does not identify files or tests.