Susceptible-Infected-Recovered-Susceptible Model

Susceptible-Infected-Recovered-Susceptible Model

SIRS_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
I_0 <- 1
R_0 <- 0
beta <- 3
chi <- 0.5
tau <- 2
dt <- 1

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

SIRS_ode(1, inits, parameters)
#> [[1]]
#>          S          S          I 
#> -2.9969697  0.9969697  2.0000000 
#>