fix docs

Author: jClugstor

docs/src/examples/ASIR.md

@@ -15,8 +15,9 @@ eqs = [Dₜ(S) ~ μₙ * S - μₘ * S - θ * α * S * Iₛ - (1 - θ) * α * S
        Dₜ(Rₐ) ~ βₐ * Iₐ - ρ * Rₐ
        Dₜ(Rₛ) ~ (1 - ωₛ) * βₛ * Iₛ - ρ * Rₛ
        Dₜ(D) ~ ωₛ * βₛ * Iₛ]
-@named asir = ODESystem(eqs)
-prob = ODEProblem(asir, [], (0, 110.0))
+@named asir = ODESystem(eqs, t)
+sys = structural_simplify(asir)
+prob = ODEProblem(sys, [], (0, 110.0))
 sol = solve(prob)
 plot(sol)
 ```

docs/src/examples/Carcione2020.md

@@ -24,7 +24,7 @@ sys = structural_simplify(odesys)
 @unpack Infected, Exposed, Deceased, Recovered, Total_population, Susceptible = sys
 @unpack alpha, epsilon, gamma, mu, beta, City = sys
 tspan = (0.0, 1.0)
-prob = ODEProblem(odesys, [], tspan, [])
+prob = ODEProblem(sys, [], tspan, [])
 sol = solve(prob, Rodas5())
 plot(sol, idxs = Deceased)
 ```

docs/src/examples/SEIRHD.md

@@ -18,7 +18,7 @@ eqs = [T ~ S + E + I + R + H + D
        Dₜ(R) ~ γ₁ * I + γ₂ * H
        Dₜ(H) ~ δ * I - (μ + γ₂) * H
        Dₜ(D) ~ μ * H];
-@named seirhd = ODESystem(eqs)
+@named seirhd = ODESystem(eqs,t)
 seirhd = structural_simplify(seirhd)
 prob = ODEProblem(seirhd, [], (0, 110.0))
 sol = solve(prob)