marginplot + setPlotScale("dB") = no magnitude plot

[stephans3]

Hi all,
I tried to use marginplot with setPlotScale("dB").

With log10 it works, but not with dB.

using ControlSystems, Plots

G = tf([100], [1, 5, 6, 5, 1])  # Example TF
marginplot(G) # This works

setPlotScale("dB")
marginplot(G) # Does not work

These warnings show up:

┌ Warning: No strict ticks found
└ @ PlotUtils ~/.julia/packages/PlotUtils/M092a/src/ticks.jl:191
┌ Warning: No strict ticks found
└ @ PlotUtils ~/.julia/packages/PlotUtils/M092a/src/ticks.jl:191

[albheim]

Seems like a few spots in ControlSystemsBase/plotting.jl are not really using the internal _PlotScale**** variables. Might be enough to update this line

ControlSystems.jl/lib/ControlSystemsBase/src/plotting.jl

Line 274 in 77e2eaa

yscale --> :log10

to use _PlotScaleFunc instead of :log10, but might also be more than that needed. And the label just next to that should probably also be updated to use _PlotScaleStr in some way as well.

Edit: Also this might change how at least bodeplot works? On the phone now so can't be bothered to look, but it might affect other things so maybe my suggested changes are not the way to go.

[baggepinnen]

Hopefully fixed by

• Use yscale --> _PlotScaleFunc in some plot recipes #799