Accept keyword arguments passed by the ControlSystemsBase 1.23 plot recipes for FRD

The Bodeplot recipe passes balance to bode, and the frequency-vector selection
passes adaptive to _default_freq_vector. Both are accepted and ignored for FRD.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

Author: baggepinnen

Project.toml

@@ -1,6 +1,6 @@
 name = "ControlSystemIdentification"
 uuid = "3abffc1c-5106-53b7-b354-a47bfc086282"
-version = "2.12.1"
+version = "2.12.2"
 authors = ["baggepinnen <baggepinnen@gmail.com>"]
 
 [deps]

src/frd.jl

@@ -110,9 +110,9 @@ end
 
 ControlSystemsBase.noutputs(f::FRD) = f.r isa AbstractVector ? 1 : size(f.r, 1)
 ControlSystemsBase.ninputs(f::FRD) = f.r isa AbstractVector ? 1 : size(f.r, 2)
-ControlSystemsBase._default_freq_vector(f::Vector{<:FRD}, _) = f[1].w
-ControlSystemsBase._default_freq_vector(f::FRD, _) = f.w
-function ControlSystemsBase.bode(f::FRD, w::AbstractVector = f.w; unwrap=true)
+ControlSystemsBase._default_freq_vector(f::Vector{<:FRD}, _; kwargs...) = f[1].w
+ControlSystemsBase._default_freq_vector(f::FRD, _; kwargs...) = f.w
+function ControlSystemsBase.bode(f::FRD, w::AbstractVector = f.w; unwrap=true, kwargs...) # kwargs such as balance do not apply to frequency-response data
     w == f.w || error("Frequency vector must match the one stored in the FRD")
     angles = angle.(f.r)
     angles = reshape(angles, f.ny, f.nu, :)

test/test_plots.jl

@@ -21,4 +21,14 @@ welchplot(d)
 Gh,_ = tfest(d)
 plot(Gh, plotphase=true)
 
-plot(tfest(d))
+plot(tfest(d))
+
+# FRD in the ControlSystemsBase plot recipes, which pass keyword arguments such as balance and adaptive
+w = exp10.(LinRange(-1, 1, 50))
+frd = FRD(w, tf(1, [1, 1, 1]))
+mag, phase, _ = bode(frd, w; unwrap=false, balance=true)
+@test vec(mag) ≈ abs.(frd.r)
+bodeplot(frd)
+bodeplot([frd, frd])
+nyquistplot(frd)
+sigmaplot(frd)