c2d not working with method input

[fibonatic]

When I attempt to specify which discretization method I want to use, for example: Gd = c2d(G::TransferFunction{<:Continuous}, Ts, method=:zoh) I get the error: c2d_x0map(::AbstractStateSpace{<:Continuous}, ::Real) got unsupported keyword argument "method"

I am using Julia 1.9.3 and just installed ControlSystems.jl today. I also get the same error in Julia 1.8.5

[baggepinnen]

This appears to work for me

julia> G = tf(1.0, [1, 1])
TransferFunction{Continuous, ControlSystemsBase.SisoRational{Float64}}
   1.0
----------
1.0s + 1.0

Continuous-time transfer function model

julia> c2d(G, 0.1, :zoh)
TransferFunction{Discrete{Float64}, ControlSystemsBase.SisoRational{Float64}}
   0.09516258196404037
-------------------------
1.0z - 0.9048374180359594

Sample Time: 0.1 (seconds)
Discrete-time transfer function model

Are you trying to use method as a keyword argument? It's a regular positional argument.

[baggepinnen]

On a side note, are you the user handle fibonatic on the control discord? If so, we spoke about coherence functions this morning ;)

[fibonatic]

Yes, I am currently busy writing some test code, but it has been a while since I used Julia. And I was indeed using method=:zoh as input argument. Without the method= it is indeed working OK. Thanks!

[baggepinnen]

You might have been confused by the fact that the method argument hasa default value indicated by the signature in the docstring

    sysd = c2d(sys::AbstractStateSpace{<:Continuous}, Ts, method=:zoh; w_prewarp=0)
    Gd = c2d(G::TransferFunction{<:Continuous}, Ts, method=:zoh)

Note the difference between the two method signatures, the ; denotes the delimitation between positional arguments and keyword arguments.