Susceptible-Exposed-Infected-Recovered-Susceptible Model

Susceptible-Exposed-Infected-Recovered-Susceptible Model

SEIRS_ode(t, x, params)

Arguments

t

The timestep over which to calculate derivatives

x

A numeric vector of compartment populations.

params

A named vector of parameter values.

Value

A vector of derivatives

Examples

##Model Input
S_0 <- 989
E_0 <- 10
I_0 <- 1
R_0 <- 0
beta <- 3
gamma <-  1/2
tau <- 2
chi <- 0.5

parameters <- c(beta = beta, gamma = gamma,
                chi = chi, tau = tau)
inits <- c(S = S_0, E = E_0, I = I_0, R_0 = R_0)

SEIRS_ode(1, inits, parameters)
#> [[1]]
#>      S      S      E      I 
#> -2.967 -2.033  3.000  2.000 
#>