Conditional model

Basic Usage
1

I am trying to create a model to simulate zero order dissolution.
I want to recreate something like this:
image
Here is my original model:

model_zero = @model begin
    @metadata begin
        desc = "Dissolution model Zero"
        timeu = u"minute"
    end
    @param begin
        "Additive RUV"
               σ_add ∈ RealDomain(lower=0)
    end
    @covariates dk0
    @pre begin
               k0 = dk0
    end
    @derived begin
        fdiss = @. k0 * t
        "Percent dissolved in vitro"
        dv_fdiss ~ @. Normal(fdiss, σ_add)
    end
end

But I want to add a variable called fdissmax that changes the model to fdiss=fdissmax if fdiss>fdissmax
It appears that if statements do not work in the derived block though.

2

Hello, @KVTobin
I think you can define fdiss = fdissmax in preblock using if statement rather than derived block.