Add keyword argument for dependent parameters

Author: hersle

src/systems/abstractsystem.jl

@@ -1335,10 +1335,11 @@ Get the standard parameters of the system `sys` and its subsystems.
 # Keyword arguments
 
 - `initial_parameters`: Whether to include parameters for initial values of variables in the initialization system.
+- `dependent_parameters`: Whether to include parameters that are determined by parameter dependencies.
 
 See also [`full_parameters`](@ref) and [`ModelingToolkit.get_ps`](@ref).
 """
-function parameters(sys::AbstractSystem; initial_parameters = false)
+function parameters(sys::AbstractSystem; initial_parameters = false, dependent_parameters = false)
     ps = get_ps(sys)
     if ps == SciMLBase.NullParameters()
         return []
@@ -1347,12 +1348,15 @@ function parameters(sys::AbstractSystem; initial_parameters = false)
         ps = first.(ps)
     end
     systems = get_systems(sys)
-    result = unique(isempty(systems) ? ps :
+    ps = unique(isempty(systems) ? ps :
                     [ps; reduce(vcat, namespace_parameters.(systems))])
     if !initial_parameters && !is_initializesystem(sys)
-        filter!(x -> !iscall(x) || !isa(operation(x), Initial), result)
+        filter!(x -> !iscall(x) || !isa(operation(x), Initial), ps)
     end
-    return result
+    if dependent_parameters
+        ps = vcat(ps, ModelingToolkit.dependent_parameters(sys))
+    end
+    return ps
 end
 
 function dependent_parameters(sys::AbstractSystem)
@@ -1399,7 +1403,7 @@ Get all parameters of the system `sys` and its subsystems, including initial val
 See also [`parameters`](@ref) and [`ModelingToolkit.get_ps`](@ref).
 """
 function full_parameters(sys::AbstractSystem)
-    vcat(parameters(sys; initial_parameters = true), dependent_parameters(sys))
+    return parameters(sys; initial_parameters = true, dependent_parameters = true)
 end
 
 """